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List vs tuple, when to use each? [duplicate]
In Python, when should you use lists and when tuples?
7 Answers
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Does Flask support regular expressions in its URL routing?
....randomify = randomify
self.regex = '(?:yes|no|maybe)'
def to_python(self, value):
if value == 'maybe':
if self.randomify:
return not randrange(2)
raise ValidationError()
return value == 'yes'
def to_url(self, value):
...
C++应用程序添加VBScript和JavaScript支持 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...C++程序中调用JavaScript及VBScript。效果截图：
源码点此下载。
Introduction
I am always amazed to see how the script control (msscript.ocx) is fun to use and at the same time how C++ developers reacted when it's time to use. Maybe the extension (.ocx) make them feel, it's vis...
How do I apply a diff patch on Windows?
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I made pure Python tool just for that. It has predictable cross-platform behavior. Although it doesn't create new files (at the time of writing this) and lacks a GUI, it can be used as a library to create graphic tool.
UPDATE: It should...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
... (likely(a > 1))
Reference: https://www.akkadia.org/drepper/cpumemory.pdf
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Relationship between SciPy and NumPy
...rary for numerical arrays, to be used by anybody needing such an object in Python. SciPy is meant to be a library for scientists/engineers, so it aims for more rigourous theorethical mathematics (thus including complex number version of log10 and the like). The main confusion comes from the fact tha...
how to find host name from IP with out login to the host
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python -c "import socket;print(socket.gethostbyaddr('127.0.0.1'))"
if you just need the name, no additional info, add [0] at the end:
python -c "import socket;print(socket.gethostbyaddr('8.8.8.8'))[0]"
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Best way to assert for numpy.array equality?
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@RamonMartinez if you use Python's unittest you can use self.assertIsNone(np.testing.assert_array_equal(a, b)) as it returns None if the arrays are equal.
– mjkrause
Nov 11 '19 at 0:25
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Remove all occurrences of a value from a list?
In Python remove() will remove the first occurrence of value in a list.
23 Answers
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Find the index of a dict within a list, by matching the dict's value
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IMHO this is not as readable or Pythonic is @Emile's answer. Because the intention is not really to create a generator (and using next() for this seems weird to me), the aim is just to get the index. Also, this raises StopIteration, whereas the Python lst.i...