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How to access environment variable values?
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print(os.environ.get('KEY_THAT_MIGHT_EXIST'))
# os.getenv is equivalent, and can also give a default value instead of `None`
print(os.getenv('KEY_THAT_MIGHT_EXIST', default_value))
Python default installation on Windows is C:\Python. If you want to find out while running python you can do:
impo...
Open document with default OS application in Python, both in Windows and Mac OS
...eed to be able to open a document using its default application in Windows and Mac OS. Basically, I want to do the same thing that happens when you double-click on the document icon in Explorer or Finder. What is the best way to do this in Python?
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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...至少不能未经过强制类型转换（转换到一个引用类型const_cast<T&>）就修改。
如果你想以一种总是可行而且安全的方式来许该set、multiset、map和multimap中的元素，则可以分5个简单步骤来进行：
1. 找到你想修改的容器的元素。如果...
Equivalent of typedef in C#
...ions:
it will not work for primitive types
the derived type can still be casted to the original type, ie we can send it to a function receiving our original type, this defeats the whole purpose
we cannot derive from sealed classes (and ie many .NET classes are sealed)
The only way to achieve a ...
Subclassing a Java Builder class
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To solve the unchecked cast warning, see the solution suggested bellow among the other answers: stackoverflow.com/a/34741836/3114959
– Stepan Vavra
Jan 12 '16 at 11:00
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How to refer to relative paths of resources when working with a code repository
We are working with a code repository which is deployed to both Windows and Linux - sometimes in different directories. How should one of the modules inside the project refer to one of the non-Python resources in the project (CSV files, etc.)?
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Python recursive folder read
I have a C++/Obj-C background and I am just discovering Python (been writing it for about an hour).
I am writing a script to recursively read the contents of text files in a folder structure.
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A positive lambda: '+[]{}' - What sorcery is this? [duplicate]
...o pass by value instead of reference. The better way would be with static_cast<T>(lvalue) to get a prvalue of type T from an lvalue. "customary to use a generic function called val()": This isn't clear, can you show an example/link of such a val() function?
– Andrew Tom...
How to open every file in a folder?
...have a python script parse.py, which in the script open a file, say file1, and then do something maybe print out the total number of characters.
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How to get all of the immediate subdirectories in Python
... return the full path to all current subdirectories.
tl;dr:
Always use scandir:
list_subfolders_with_paths = [f.path for f in os.scandir(path) if f.is_dir()]
Bonus: With scandir you can also simply only get folder names by using f.name instead of f.path.
This (as well as all other functions b...