This question already has answers here: How do I get my program to sleep for 50 milliseconds? (6 answers) Closed 2 years ago. I would like to know how to put a time delay in a Python script. 13 s 13 import time time.sleep(5) # Delays for 5 seconds. You can also use a float … Read more
Should I put the shebang in my Python scripts? In what form? #!/usr/bin/env python or #!/usr/local/bin/python Are these equally portable? Which form is used most? Note: the tornado project uses the shebang. On the other hand the Django project doesn’t. 15 s 15 The shebang line in any script determines the script’s ability to be … Read more
In Python 2.7, I could get dictionary keys, values, or items as a list: >>> newdict = {1:0, 2:0, 3:0} >>> newdict.keys() [1, 2, 3] Now, in Python >= 3.3, I get something like this: >>> newdict.keys() dict_keys([1, 2, 3]) So, I have to do this to get a list: newlist = list() for i … Read more
This question’s answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. I’m mainly a C# developer, but I’m currently working on a project in Python. How can I represent the equivalent of an Enum in Python? 43 s 43
I want to import a function from another file in the same directory. Sometimes it works for me with from .mymodule import myfunction but sometimes I get a: SystemError: Parent module ” not loaded, cannot perform relative import Sometimes it works with from mymodule import myfunction, but sometimes I also get a: SystemError: Parent module … Read more
TypeError: ‘str’ does not support the buffer interface suggests two possible methods to convert a string to bytes: b = bytes(mystring, ‘utf-8’) b = mystring.encode(‘utf-8’) Which method is more Pythonic? 5
Can anyone please explain what setup.py is and how it can be configured or used? 10 setup.py is a python file, the presence of which is an indication that the module/package you are about to install has likely been packaged and distributed with Distutils, which is the standard for distributing Python Modules. This allows you … Read more
How do I refer to the null object in Python? 8 In Python, the ‘null’ object is the singleton None. To check if something is None, use the is identity operator: if foo is None: …
How do I force Python’s print function to output to the screen? 1 13 In Python 3, print can take an optional flush argument: print(“Hello, World!”, flush=True) In Python 2 you’ll have to do import sys sys.stdout.flush() after calling print. By default, print prints to sys.stdout (see the documentation for more about file objects).
What is the Python 3 equivalent of python -m SimpleHTTPServer? 7 From the docs: The SimpleHTTPServer module has been merged into http.server in Python 3.0. The 2to3 tool will automatically adapt imports when converting your sources to 3.0. So, your command is python -m http.server, or depending on your installation, it can be: python3 -m … Read more
