|
|
- What is Pythons equivalent of (logical-and) in an if-statement?
There is no bitwise negation in Python (just the bitwise inverse operator ~ - but that is not equivalent to not) See also 6 6 Unary arithmetic and bitwise binary operations and 6 7 Binary arithmetic operations The logical operators (like in many other languages) have the advantage that these are short-circuited
- What does colon equal (:=) in Python mean? - Stack Overflow
In Python this is simply = To translate this pseudocode into Python you would need to know the data structures being referenced, and a bit more of the algorithm implementation Some notes about psuedocode::= is the assignment operator or = in Python = is the equality operator or == in Python ; There are certain styles, and your mileage may vary:
- slice - How slicing in Python works - Stack Overflow
In Python 2 7 Slicing in Python [a:b:c] len = length of string, tuple or list c -- default is +1 The sign of c indicates forward or backward, absolute value of c indicates steps Default is forward with step size 1 Positive means forward, negative means backward a -- When c is positive or blank, default is 0 When c is negative, default is -1
- python - What does the caret (^) operator do? - Stack Overflow
Side note, seeing as Python defines this as an xor operation and the method name has "xor" in it, I would consider it a poor design choice to make that method do something not related to xor like exponentiation I think it's a good illustrative example of how it simply calls the __xor__ method, but to do that for real would be bad practice –
- python - What is the purpose of the -m switch? - Stack Overflow
You must run python my_script py from the directory where the file is located Alternatively - python path to my_script py However, you can run python -m my_script (ie refer to the script by module name by omitting the py) from anywhere, as long as Python can find it! Python searches as follows (not 100% sure about the order): Current directory
- python - What exactly does += do? - Stack Overflow
In Python, += is sugar coating for the __iadd__ special method, or __add__ or __radd__ if __iadd__ isn't present The __iadd__ method of a class can do anything it wants The list object implements it and uses it to iterate over an iterable object appending each element to itself in the same way that the list's extend method does
- What is :: (double colon) in Python when subscripting sequences?
When slicing in Python the third parameter is the step As others mentioned, see Extended Slices for a nice overview With this knowledge, [::3] just means that you have not specified any start or end indices for your slice Since you have specified a step, 3, this will take every third entry of something starting at the first index For example:
|
|
英文每年常用名排名
2023 年排名
2022 年排名
2021 年排名
2020 年排名
2019 年排名
2018 年排名
2017 年排名
2016 年排名
2015 年排名
2014 年排名
2013 年排名
2012 年排名
2011 年排名
2010 年排名
2009 年排名
2008 年排名
2007 年排名
2006 年排名
2005 年排名
2004 年排名
2003 年排名
2002 年排名
2001 年排名
2000 年排名
英文名字起源
希伯来
希腊
条顿
印度
拉丁
拉丁语
古英语
英格兰
阿拉伯
法国
盖尔
英语
匈牙利
凯尔特
西班牙
居尔特
非洲
美洲土著
挪威
德国
威尔士
斯拉夫民族
古德语
爱尔兰
波斯
古法语
盎格鲁撒克逊
意大利
盖尔语
未知
夏威夷
中古英语
梵语
苏格兰
俄罗斯
土耳其
捷克
希腊;拉丁
斯干那维亚
瑞典
波兰
乌干达
拉丁;条顿
巴斯克语
亚拉姆
亚美尼亚
斯拉夫语
斯堪地纳维亚
越南
荷兰
|