python
how do I fix this error I am getting
code:
from tkinter import *
expression = ""
def press(num):
global expression
expression = expression + str(num)
equation.set(expression)
def equalpress():
try:
global expression
total = str(eval(expression))
equation.set(total)
expression = ""
except:
equation.set(" error ")
expression = ""
def clear():
global expression
expression = ""
equation.set("")
equation.set("")
if __name__ == "__main__":
gui = Tk()
gui.geometry("270x150")
equation = StringVar()
expression_field = Entry(gui, textvariable=equation)
expression_field.grid(columnspan=4, ipadx=70)
buttonl = Button(gui, text=' 1', fg='black', bg='white',command=lambda: press(1), height=l, width=7)
buttonl.grid(row=2, column=0)
button2 = Button(gui, text=' 2', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button2.grid(row=2, column=1)
button3 = Button(gui, text=' 3', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button3.grid(row=2, column=2)
button4 = Button(gui, text=' 4', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button4.grid(row=3, column=0)
button5 = Button(gui, text=' 5', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button5.grid(row=3, column=1)
button6 = Button(gui, text=' 6', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button6.grid(row=3, column=2)
button7 = Button(gui, text=' 7', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button7.grid(row=4, column=0)
button8 = Button(gui, text=' 8', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button8.grid(row=4, column=1)
button9 = Button(gui, text=' 9', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button9.grid(row=4, column=2)
button0 = Button(gui, text=' 0', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
button0.grid(row=5, column=0)
Add = Button(gui, text=' +', fg='black', bg='white',command=lambda: press("+"), height=l, width=7)
Add.grid(row=2, column=3)
Sub = Button(gui, text=' -', fg='black', bg='white',command=lambda: press(2), height=l, width=7)
Sub.grid(row=3, column=3)
Div = Button(gui, text=' /', fg='black', bg='white',command=lambda: press("/"), height=l, width=7)
Div.grid(row=5, column=3)
Mul = Button(gui, text=' *', fg='black', bg='white',command=lambda: press("*"), height=l, width=7)
Mul.grid(row=4, column=3)
Equal = Button(gui, text=' =', fg='black', bg='white',command=equalpress, height=l, width=7)
Equal.grid(row=5, column=2)
Clear = Button(gui, text=' Clear', fg='black', bg='white',command=clear, height=l, width=7)
Clear.grid(row=5, column=1)
Decimal = Button(gui, text=' .', fg='black', bg='white',command=lambda: press("."), height=l, width=7)
buttonl.grid(row=6, column=0)
gui.mainloop()
Answer:
from tkinter import *
expression = ""
def press(num):
global expression
expression = expression + str(num)
equation.set(expression)
def equalpress():
try:
global expression
total = str(eval(expression))
equation.set(total)
expression = ""
except:
equation.set(" error ")
expression = ""
def clear():
global expression
expression = ""
equation.set("")
if __name__ == "__main__":
gui = Tk()
equation = StringVar(gui, "")
equation.set("")
gui.geometry("270x150")
expression_field = Entry(gui, textvariable=equation)
expression_field.grid(columnspan=4, ipadx=70)
buttonl = Button(gui, text=' 1', fg='black', bg='white',command=lambda: press(1), height=1, width=7)
buttonl.grid(row=2, column=0)
button2 = Button(gui, text=' 2', fg='black', bg='white',command=lambda: press(2), height=1, width=7)
button2.grid(row=2, column=1)
button3 = Button(gui, text=' 3', fg='black', bg='white',command=lambda: press(3), height=1, width=7)
button3.grid(row=2, column=2)
button4 = Button(gui, text=' 4', fg='black', bg='white',command=lambda: press(4), height=1, width=7)
button4.grid(row=3, column=0)
button5 = Button(gui, text=' 5', fg='black', bg='white',command=lambda: press(5), height=1, width=7)
button5.grid(row=3, column=1)
button6 = Button(gui, text=' 6', fg='black', bg='white',command=lambda: press(6), height=1, width=7)
button6.grid(row=3, column=2)
button7 = Button(gui, text=' 7', fg='black', bg='white',command=lambda: press(7), height=1, width=7)
button7.grid(row=4, column=0)
button8 = Button(gui, text=' 8', fg='black', bg='white',command=lambda: press(8), height=1, width=7)
button8.grid(row=4, column=1)
button9 = Button(gui, text=' 9', fg='black', bg='white',command=lambda: press(9), height=1, width=7)
button9.grid(row=4, column=2)
button0 = Button(gui, text=' 0', fg='black', bg='white',command=lambda: press(2), height=1, width=7)
button0.grid(row=5, column=0)
Add = Button(gui, text=' +', fg='black', bg='white',command=lambda: press("+"), height=1, width=7)
Add.grid(row=2, column=3)
Sub = Button(gui, text=' -', fg='black', bg='white',command=lambda: press("-"), height=1, width=7)
Sub.grid(row=3, column=3)
Div = Button(gui, text=' /', fg='black', bg='white',command=lambda: press("/"), height=1, width=7)
Div.grid(row=5, column=3)
Mul = Button(gui, text=' *', fg='black', bg='white',command=lambda: press("*"), height=1, width=7)
Mul.grid(row=4, column=3)
Equal = Button(gui, text=' =', fg='black', bg='white',command=equalpress, height=1, width=7)
Equal.grid(row=5, column=2)
Clear = Button(gui, text=' Clear', fg='black', bg='white',command=clear, height=1, width=7)
Clear.grid(row=5, column=1)
Decimal = Button(gui, text=' .', fg='black', bg='white',command=lambda: press("."), height=1, width=7)
Decimal.grid(row=6, column=0)
gui.mainloop()
Explanation:
I fixed several other typos. Your calculator works like a charm!
If the system has a mechanical advantage of 5 and the load of 350N.What effort is needed to lift the weight? Provide your answer in newtons
Answer:
Effort = 70 N
Explanation:
A machine is a device that can be used to overcome a load by the application of a minimal effort. For a practical machine, mechanical advantage (MA) is the ratio of the load (L) overcome to the effort (E) applied.
i.e MA = [tex]\frac{Load}{Effort}[/tex]
In the given question, MA = 5 and the load = 350 N. So that;
5 = [tex]\frac{350}{E}[/tex]
E = [tex]\frac{350}{5}[/tex]
= 70
The effort applied to the machine is 70 N.
For a processor with primary and secondary caches, an instruction cache miss rate of 1%, a data cache miss rate of 5%, a instruction mix of 40% data accesses, a primary to secondary cache miss penalty of 10 cycles and a secondary cache to main memory miss penalty of 200 cycles and a secondary miss rate of 0.2%, what will be the contribution to total CPI from the cache misses (in decimal)
Answer:
The answer is "0.306".
Explanation:
The Primary to Secondary Memory Instruction miss cycle
[tex]= I \times 0.01 \times 10 = 0.1 I[/tex]
Data miss cycles[tex]= I \times 0.05 \times 10 \times 0.40 = 0.2 I[/tex]
The Secondary to main Memory Instruction miss cycle[tex]= I \times 0.01 \times 200 \times 0.0002 = 0.004 I[/tex]
Data miss cycles[tex]= I \times 0.05 \times 200 \times 0.0002 = 0.002 I[/tex]
Total memory stall cycle [tex]= ( 0.1 + 0.2 + 0.004 + 0.002 ) I =0.306 I[/tex]
Select the correct answer.
Dina created a database related to essential oils and their uses. For every oil, she wants to enter a unique code number. Which data type would be suitable for entering this data?
A.
Boolean
B.
autonumber
C.
BLOb
D.
memo
E.
null
Answer:
Autonumber
This is because Autonumber is the only option out of the four that accepts random unique code numbers
Feel free to mark as brainliest :D
what is the behavior of an element with static positioning in regard to the page layout?
Answer:
The element is positioned according to the normal flow of the document.
The top, right, bottom, left, and z-index properties have no effect. This is the default value.
The behavior of an element with static positioning in regard to the page layout is that it implies that one put the element in its original position in the aspect of document flow.
What does Static positioning implies?Static positioning is known to be the normal way that all element have or gets. It implies that one should "put the element into its original place in the document flow as there is nothing special that one needs to see here."
Hence, the behavior of an element with static positioning is known to be the same and thus If a person do save and refresh, there will be no changes except when there is an updated background color.
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what is a iteration in program code?
Answer:
it's when the code keeps repeating e.g while loop
Explanation:
If you misspell a word in your Java program it may be true that I. the program will not compile II. the program may compile, but not run III. the program may compile and run but still have a logic error
Answer:
option I
Explanation:
If you misspell a word in your Java program it may be true that the program will not compile
How will future space flights be different for NASA?
Answer:
Explanation:
NASA's future will continue to be a story of human exploration, technology, and science. NASA will continue to be a global leader in scientific discovery, fostering opportunities to turn new knowledge into things that improve life here on Earth. ... Artist's concept, NASA's gateway in lunar orbit.
Answer:
NASA's future will continue to be a story of human exploration, technology, and ... changes on the global land surface at a scale where we can separate human ... Exploring deep space and three-year missions to Mars pose new challenges: ...
Explanation:
NASA's Artemis program aims to land another man and the first woman on the moon by 2024 and eventually establish sustainable space travel by 2028. The Artemis program is NASA's stepping stone to their ultimate goal of landing on Mars.
The storage device which is not usually used as secondary storage is 1 point a) Semiconductor Memory b) Magnetic Disks c) Magnetic Drums d) Magnetic Tapes
Answer:
a) Semiconductor Memory
Explanation:
A primary storage device is a medium that holds memory for short periods of time while a computer is running
Semiconductor devices are preferred as primary memory.
ROM, PROM, EPROM, EEPROM, SRAM, DRAM are semiconductor (primary) memories.
What would be the purpose of grouping worksheets in a workbook?
All formatting would be done on all sheets at once.
All header rows would be shared on all sheets at once.
All data entered would be entered on all sheets at once.
All formulas entered would be entered on all sheets at once.
Answer: A
Explanation:
(a) How many copies of the book titled "The Lost Tribe" are owned by the library branch whose name is "Sharpstown"? (b) How many copies of the book titled "The Lost Tribe" are owned by each library branch? (c) Retrieve the names of all borrowers who do not have any books checked out. (d) For each book that is loaned out from the Sharpstown branch and whose DueDate is prior to "September 1, 2018", retrieve the book title, the borrower’s name, and the borrower’s address. (e) For each book authored (or coauthored) by Stephen King, retrieve the title and the number of copies owned by the library branch whose name is "Central". (f) Retrieve all book titles that are available in "Sharpstown" branch but not in "Morristown" branch. (g) Retrieve book titles that are available in all library branches in the database.
Answer:
a) SELECT No_of_copies
FROM ((book JOIN book_copies) JOIN library_branch)
WHERE title = 'The Lost Tribe' AND branchname = 'Sharpstown';
b) SELECT branchname, No_of_copies
FROM ((book JOIN book_copies) JOIN library_branch)
WHERE title = 'The Lost Tribe'
GROUP BY branchname;
c) SELECT Name
FROM borrowers B
WHERE cardno NOT IN ( SELECT cardno FROM book_loan)
d) SELECT title, name, B.address
FROM (((book JOIN book_loan) JOIN library_branch) JOIN borrowers B)
WHERE duedate = '09/01/2018' AND branchname = 'Sharpstown';
e) SELECT title, No_of_copies
FROM (((book JOIN book_authors) JOIN book_copies) JOIN library_branch)
WHERE authorname = 'Stephen King' AND branchname = 'Central';
g) SELECT DISTINCT title
FROM ((book JOIN book_copies) JOIN library_branch)
Explanation:
The SQL statements query's a book store database of seven relations using joins and subqueries to return results.
Select the correct answer.
How are cells in a spreadsheet named?
A.
based on the header of the row they are in
B.
based on the header of the column they are in
C.
based on the row and column they are in
D.
by right-clicking them and giving them a name
Answer: its C
Explanation:
Answer:
C: Based on the row and column they are in.
Explanation:
Sells have spreadsheet but only one main system of our body. thus. forum of inside to cupture the entire blood to spread and make other resources from our body.
HOPE IT HELPS!
The first field of an Internet Control Message Protocol (ICMP) packet specifies the message type. Which choices represent message type examples? Check all that apply.
Answer: destination unreachable
time exceeded
Explanation:
You didn't give the options to the question but based on a similar question there I got online, the answer will be destination unreachable and time exceeded.
The Internet Control Message Protocol (ICMP) refers to a protocol that is used in the communication of problems with regards to the transmission of data. Based on the information given, the choices that represent message type examples are:
• destination unreachable
• time exceeded
Universal Containers is designing a new community using the Customer Community license type. They would like to have the users complete survey questions through the community interface and store the responses in a Custom Object that has a lookup to the account object. Any internal user who has access to the account should be able to see all survey responses. All Customer Community users should be able to see surveys filled in by other users for their company, but not surveys for other companies. What are the correct security settings to achieve this
Answer:
The correct option is B. Set all Organization-Wide Default security to be "Private" for both internal and external users and use Sharing Rules to grant the desired access.
Explanation:
Note: This question is not complete as the options are not included. The complete question with the options is therefore provided before answering the question as follows:
Universal Containers is designing a new community using the Customer Community license type. They would like to have the users complete survey questions through the community interface and store the responses in a Custom Object that has a lookup to the account object. Any internal user who has access to the account should be able to see all survey responses. All Customer Community users should be able to see surveys filled in by other users for their company, but not surveys for other companies. What are the correct security settings to achieve this?
A. Set all Organization-Wide Default security to be "Public Read/Write" for internal users and "Private" for external users.
B. Set all Organization-Wide Default security to be "Private" for both internal and external users and use Sharing Rules to grant the desired access
C. Set all Organization-Wide Default settings to be "Public Read/Write" for both internal and external users.
D. Set the custom object to be master-detail to the Account and leave the Organization-Wide Default settings as their default values.
The explanation of the answer is now provided as follows:
Organization Wide Default security refers to settings that provides most restrictive settings that may be opened up by Role Hierarchy and Role hierarchy can be opened by Sharing rules. And the visibility of records at the record level is determined by all of these factors. Private, Public Read, Read/Write, and Read/Write & Transfer are the four permissions available in Sharing Rules.
The rules that are used to offer sharing access to users in public groups, roles, or territories are referred to as sharing rules. By introducing automatic exceptions to your org-wide sharing policies, sharing rules allow certain users more access.
By implication, the correct security settings to achieve the objective stated in the question is to set all Organization-Wide Default security to be "Private" for both internal and external users and use Sharing Rules to grant the desired access.
Therefore, the correct option is B. Set all Organization-Wide Default security to be "Private" for both internal and external users and use Sharing Rules to grant the desired access.
The Visual Basic workspace contains several worksheets. What window does the user use when developing a project?
A)Toolbox
B)Solution Window
C)Properties Window
D)Form Designer Window
On the Print screen, which portion shows you a sample of how the publication will look when printed?
Printer
Settings
Number of Copies
Print Preview
Answer:
D. Print Preview
Explanation:
print preview allows you to view the layout of your paper before you print it hence the pre part of preview
Print preview allows you to view the layout of your paper before you print it hence the pre part of preview.
What is Print preview?A feature called print preview shows what a printed copy would look like on the screen. By checking the layout using print preview before printing, you can detect any potential problems and prevent the need for multiple prints, saving ink or toner and paper.
You can examine a page in landscape mode by switching the page orientation in the print preview from portrait to landscape. Sadly, not all software supports this function.
You are unable to see how your page will print in landscape format if the program you are using lacks any settings or print preview features.
Therefore, Print preview allows you to view the layout of your paper before you print it hence the pre part of preview.
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Roger wants to give semantic meaning to the contact information, which is at the bottom of the web page. To do this he will use a footer element as a ______ of the contact information.
Answer:
Parent
Explanation:
HTML is an acronym for hypertext markup language and it is a standard programming language which is used for designing, developing and creating web pages.
Generally, all HTML documents are divided into two (2) main parts; body and head. The head contains information such as version of HTML, title of a page, metadata, link to custom favicons and CSS etc. The body of a HTML document contains the contents or informations that a web page displays.
In this scenario, Roger wants to give semantic meaning (an element conveying informations about the type of content contained within an opening and closing tag) to a contact information placed at the bottom of a webpage. Thus, in order to do this, he should use a footer element as a parent of the contact information and as such all instance variables that have been used or declared in the footer class (superclass) would be present in its contact information (subclass object).
in school there are 1800 boys and 1200 girls in an exam only 32% of the boys passed and 50% of the girls passed. find the percentage of the total who did not pass. someone pls help me with this you could send it to me by tomorrow pls do it step by step so I can get it thank you
1. __ and ___ were used in first generation computers
Answer:
Explanation:
vacuum tubes and punched cards were used in first generation computers.
to calculate perimeter of a rectangle
a+b+c+d= perimeter of a rectangle
Answer:
A+B+D+C
Explanation:
Just add all the sides together....
What can you do to help avoid or minimize accident while working at the farm?
Answer:
safety first
Explanation:
avoid the narrow materials that cause an accident
compare shopping centre and open -air market
Answer:
The similarities between a shopping center and an open-air market are;
1. Goods are bought and sold in both a shopping center and an open-air market
2. The stores within the location have different owners
3. Buyers can move between stores for transactions
The differences between a shopping center and an open-air market are;
1) The shopping center is usually roofed, while an open-air market is usually located outdoors
2) The stores in a shopping center more often have a checkout point, while stores in an open-air market rarely make use of a checkout
3) Items found with a defect after purchase can usually be returned for a replacement in a shopping center, while it is necessary to check an item well when buying from an open-air market as returning such items is usually difficult
Explanation:
A shopping center is a complex or area that have several shop groups built together which can all be located under a roof
Professional offices, restaurants, banks, theaters, and pharmacy's can also be located in a shopping center
Open-air market is a place in the public used for the sale of food and merchandise
You need to replace a broken monitor on a desktop system. You decide to replace it with a spare monitor that wasn't being used. Even though the monitor is made by a different manufacturer than the desktop computer, it still works with the computer. Which computer design concept makes this possible
Answer:
standardization
Explanation:
A problem can be defined as an issue or challenge encountered by a person, which typically requires a solution.
Generally, problems are considered to be either simple or complex depending on the individual, parameters, and factors involved.
This ultimately implies that, problems are relative in nature but always require that a solution be proffered.
In this scenario, a broken monitor on a desktop system needs to be replaced. You then decided to replace the monitor with a spare monitor that wasn't being used.
Although, the spare (replacement) monitor was manufactured by a different manufacturer than the desktop computer but it still worked with the computer. Thus, the computer design concept which makes this possible is referred to as standardization.
Standardization can be defined as a design concept which avails users the opportunity to use various components from different manufacturers interchangeably without any defect or compromise of the integrity of a system. The most important criteria to be considered is if the components meet set standards i.e specifications of the system.
The ________ sort usually performs fewer exchanges than the ________ sort. Group of answer choices bubble, selection binary, linear selection, bubble ANSI, ASCII None of these
Answer:
Answer is C
100% guaranteed.
list = [1,2,3,'a','b','c'] ... write a code to output b * (python)
Answer:
please tell me if you find the answer i have the same q for my IT med term
Answer:
print(list[4])
Explanation:
Complete breakdown:
The command 'print' shows what command is displayed on the screen
The 'list' shows that Python should print something inside a list
The '4' is the index number of list. Index numbers start from 0 so
'1' - 0
'2'- 1
'3' - 2
'a' - 3
'b' - 4
'c' - 5
Which tab on the Ribbon contains the command to print a publication?
File
Home
Insert
Page Design
Answer:
File
Explanation:
Click on the File ribbon and find the print option.
Answer:
File is your answer =)
Explanation:
When attaching a file or files in outlook 365 you select the attach command and then select the files location
Answer:
When you click the attachment button a window pops up allowing you to select the file/s you want to upload
You can also drag and drop file/s this is an alternative method
Explanation:
Microsoft Outlook is a personal information manager software system from Microsoft.
Though primarily an email client, Outlook also includes such functions as calendaring, task managing, contact managing, note-taking, journal logging, and web browsing. Wikipedia
define micro computer
Write a Scientific report modeling a written reasearch paper on big data applications.
Big data applications is known to be the methods and ways that are often used to handle large amount of data.
What is Scientific data modeling in big data?Data modeling is known to be the ways of analyzing the “areas” of interest to one's organization and how these things is linked to each other.
Note that The data modeling helps us to know and also helps in documentation of the data resources needed for one's business.
Big data are often measured by terabytes and lots more and as such managing them is one that is time-consuming,.
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plants absorb water through root hairs.How do you think this water is used by the plants?