756 Answered Questions for the topic Python

Python Newline

05/11/19

How to print without newline or space?
The question is in the title.I'd like to do it in [tag:Python]. What I'd like to do in this example in [tag:C]:<!-- language: lang-c --> #include <stdio.h> int main() { ... more
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05/10/19

What does if __name__ == "__main__": do?
What does the `if __name__ == "__main__":` do? # Threading example import time, thread def myfunction(string, sleeptime, lock, *args): while True: lock.acquire() ... more
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05/10/19

Meaning of @classmethod and @staticmethod for beginner?
Could someone explain to me the meaning of `@classmethod` and `@staticmethod` in python? I need to know the difference and the meaning. As far as I understand, `@classmethod` tells a class that... more
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Python

05/10/19

How to read a text file into a string variable and strip newlines?
I use the following code segment to read a file in python: with open ("data.txt", "r") as myfile: data=myfile.readlines()Input file is:<!-- language: lang-none --> ... more
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Python Mysql

05/09/19

How do I connect to a MySQL Database in Python?
How do I connect to a MySQL database using a python program?
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05/09/19

How to prettyprint a JSON file?
I have a JSON file that is a mess that I want to prettyprint-- what's the easiest way to do this in python? I know PrettyPrint takes an "object", which I think can be a file, but I don't know how... more
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Python

05/09/19

I am not a US Citizen
Hello wyzant.com,I am not a US citizen. Can I teach on wyzant.com with you.RegardSajid U.Thanks
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05/08/19

How do I access environment variables from Python?
I set an environment variable that I want to access in my Python application. How do I get this value?
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05/08/19

What is the use of "assert" in Python?
I have been reading some source code and in several places I have seen the usage of `assert`. What does it mean exactly? What is its usage?
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Python List Indexing

05/08/19

In Python, how do you get the last element of a list?
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05/08/19

Extracting extension from filename in Python?
Is there a function to extract the extension from a filename?
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05/08/19

How to make a chain of function decorators?
How can I make two decorators in Python that would do the following? @makebold @makeitalic def say(): return "Hello"...which should return: "<i>Hello</i>"I'm not... more
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05/06/19

Why are default arguments evaluated at definition time in Python?
I had a very difficult time with understanding the root cause of a problem in an algorithm. Then, by simplifying the functions step by step I found out that evaluation of default arguments in... more
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Python Newline Trailing

05/05/19

How can I remove a trailing newline in Python?
What is the Python equivalent of Perl's `chomp` function, which removes the last character of a string if it is a newline?
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05/05/19

How do I pass a variable by reference?
The Python documentation seems unclear about whether parameters are passed by reference or value, and the following code produces the unchanged value 'Original' class PassByReference:  def... more
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Python Directory

05/05/19

How to find if directory exists in Python?
In the `os` module in Python, is there a way to find if a directory exists, something like: >>> os.direxists(os.path.join(os.getcwd()), 'new_folder')) # in pseudocode True/False
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05/05/19

Using global variables in a function?
How can I create or use a global variable in a function?If I create a global variable in one function, how can I use that global variable in another function? Do I need to store the global variable... more
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Python Dictionary Pop Del

05/04/19

Delete an element from a dictionary?
Is there a way to delete an item from a dictionary in Python?Additionally, how can I delete an item from a dictionary to return a copy (i.e., not modifying the original)?
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05/04/19

open() in Python does not create a file if it doesn't exist?
What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it as read/write? From what I read, `file = open('myfile.dat', 'rw')` should do this,... more
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Python Directory

05/03/19

Find current directory and file's directory?
In Python, what commands can I use to find:1. the current directory (where I was in the terminal when I ran the Python script), and2. where the file I am executing is?
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Python String Path

05/02/19

How to get the filename without the extension from a path in Python?
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Python Time

05/01/19

How do I get time of a Python program's execution?
I have a command line program in Python that takes a while to finish. I want to know the exact time it takes to finish running.I've looked at the `timeit` module, but it seems it's only for small... more
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04/30/19

How to delete a file or folder in Python?
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Python Pandas Dataframe

04/30/19

Select rows from a DataFrame based on values in a column in pandas?
How to select rows from a DataFrame based on values in some column in pandas? In SQL I would use: select * from table where colume_name = some_value. *I tried to look at pandas documentation... more
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Python Coding

04/30/19

I'm struggling in Python programming Class.
Class uses a book called Python for everyone.We meet with the teacher once a week for 2 hours.He usually only talks about the meaning of the chapter per week we go through.He gives HW and... more
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