Develop Reference

.py Files Aren't Opening Correctly

I am Writing The Code That You Can See Under That Article On IDLE It Correctly Works But When I Save The Code As A .py File It Doesn't Opens How I Can Open A .py File Correctly?
import random
from random import randint
random.randint(111111111, 999999999)
(Problem Solved I Erase The The Code That You Can See Under That Article And It Works)
from random import randint

If you are attempting to open a .py file by double clicking on it, you need to have the version of python you want to run it with added to your PATH. Also you need the .py file extension associated with the Python application.
The other way to do this is to have all .py files opened with Idle, Pycharm, Sublime Text, etc (Whatever IDE you sue to write it). This wont automatically run the file however, it will open it in an editable state in your IDE.
Lastly, as it relates to the code you provided, importing randint() is not necessary as you've already imported the entire random module.

Asking for overwrite while trying to run script in ipython

I am fairly new to programming in python. I installed anaconda and am running iPython (the Jupyter qtconsole) v.4.3.0 and python v.3.6 on a Mac. Currently, I am trying to import a module with functions located in my home directory.
I have looked at stackoverflow and python documentation and found that it could be done with:
%run "Users/myUser/python_functions.py"
or
import python_functions
However, when I try both of these approaches, I get prompted to overwrite the file that I am running or importing:
File `python_functions.py` exists. Overwrite (y/[N])?
This is changing the previous file and not getting the functions I want to be imported.
What may explain this, and what can I do to import my module?

this is wrong but leaving it up for shame
import on ubuntu (and I'm guessing many other unix-like OSs including Mac) is a utility that saves any visible window on an X server and outputs it as an image file. You can capture a single window, the entire screen, or any rectangular portion of the screen.
My guess if you are running the import command in your console, and it's about to take a screenshot and save it over an existing file - python_functions
Before you the use the python import command, start a python interpreter:
$ python
>>>import yourfile
edit: on re-reading your question, I'm not so sure about my guess anymore, but leaving it up until you tell me I'm wrong :)

Running Jupyter qtconsole as an interpreter is likely causing the problem in this scenario. Instead using a IDE or command line interpreter will resolve it .
Since anaconda was installed, trying it with the IDE Spyder executes the code just fine without the overwrite prompt. It works on others (e.g PyCharm, Rodeo, etc.) as well.

Python 3.5.1 in Anaconda 3 from JetBrains PyCharm IDE - environment objects

I am coming into Python from R, and installed Python 3.5 with Anaconda. Now, PyCharm console has a prompt identical to an iPython Notebook, i.e. instead of >>>, it shows [1] at the command line.
After writing a toy line of code (below) in a .py document, and running it from within PyCharm, showing no errors, I was under the assumption that the function toss(), which was defined in the .py document would be ready to use in the console. However this did not seem to be the case. I ended up copying and pasting the pertinent lines of code on the console, entering, and then, finally, the function toss() was accessible to produce random examples of the roll of a die.
Logically, there has to be a smoother way of moving code from a .py file in the Editor to the environment accessible from the Python Console. But this shorter way doesn't seem to be simply running the .py file.
Code:
import random
def toss():
return(random.randint(1,6))
So how do you make the code in a Python file in the Editor accessible in the local environment?

You need to import it first. Let's say that your function toss() is in a file called foo.py then that means that you can do
from foo import toss
toss()
in your Python Console to use your function. A Python source file is, by definition, a module and you'll need to import it in order to use any functions defined there.

How to create a .py file within canopy?

I am using Enthought canopy for data analysis. I didn't find any option to create a .py file to write my code and save it for later use. I tried File> New >IPython Notebook, wrote my code and saved it. But the next time I opened it within Canopy editor, it wasn't editable. I need something like a Python shell where you just open a 'New Window', write all your code and press F5 to execute it. It could be saved for later use as well. Although pandas and numpy work in canopy editor, they are not recognized by Python shell (whenever I write import pandas as pd, it says no module named pandas). Please help.

Umair, ctrl + n or File > Python File will do what you want.
Best,
Jonathan

Let me add that if you need to open the file, even if it's a text file but you want to be able to run it as a Python file (or whatever language format) just look at the bottom of the Canopy window and select the language you want to use. In some cases it may default to just text. Click it and select the language you want. Once you've done that, you'll see that the run button will be active and the command appear in their respective color.

How to get out of interactive mode in Python

This obviously an extremely novice question, but I've installed Python 2.7 and started reading the manual. However I looked and looked, and couldn't understand how to start programming a file rather than writing in interactive mode. One book that was online suggested quit(), which surprise -- quit the program.
Should coding be done in a different program? I'm using IDLE (Python GUI). Can coding not be done within that program?

Yes, coding should be done in a different program. The interactive shell is very useful but it's not an editor.

You write Python code line by line (as you would on Python interactive mode) in a text editor such as vim, emacs etc...
Then you run these line by line code using the Python interpreter by giving it the name of your script.
$ python myscript.py

I like to use a different directory for each project. Suppose I decide to use W:/mytest as my directory. First I create the directory.
Then I start Idle. I type the following:
import os
os.chdir("W:/mytest")
This makes W:/mytest the current directory for Idle.
import sys
sys.path.append(".")
This changes the path so that when I "import", it will look in the current directory.
Next I do File / New Window to open an editor window, and in that new window I select File / Save As. It starts in the Python home directory so I have to navigate to W:/mytest. I save this (empty) file as "test1.py".
I type this into my test1.py file and save it again:
""" test1.py is my test
"""
print ("This is test1.")
class Test1:
def __init__(self):
print ("Constructed")
This is a contrived example that can be run as a script or imported as a module.
So I have two windows now; an editor window and the Idle "Python Shell". I can do this in the Python Shell:
>>> execfile("test1.py")
This is test1.
>>> import test1
This is test1
>>> tt = test1.Test1()
Constructed

Push new to start making your own script file. Then when you are ready to test click run and then you can watch the results in the interactive mode, and even try new things as if you were adding code to the end of your script file, its a very useful app for debugging, testing and trying new things.
Also in the options you can change the way python opens your scripts when you click edit from windows, you can set it so that it opens the interactive shell or just the editor.

use new window tool in the file icon,in the python idle itself to write a program

To start coding in a file, just open a new file and start typing.