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How to write PNG image to string with the PIL?
...inal file format, so in this case you can use format=image.format.
In old Python 2 versions before introduction of the io module you would have used the StringIO module instead.
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The smallest difference between 2 Angles
...ept angles outside the range [0, 2π) you can generalize the above. Here's Python code for the generalized version:
PI = math.pi
TAU = 2*PI
def smallestSignedAngleBetween(x, y):
a = (x - y) % TAU
b = (y - x) % TAU
return -a if a < b else b
Note that the % operator does not behave t...
Check if item is in an array / list
... @jdi, and that loop will run much faster than the one coded explicitly in Python, not to mention being easier to read.
– Mark Ransom
Jun 28 '12 at 19:44
...
Getting only 1 decimal place [duplicate]
...ing to represent it with only one digit:
print("{:.1f}".format(number)) # Python3
print "%.1f" % number # Python2
or actually round off the other decimal places?
round(number,1)
or even round strictly down?
math.floor(number*10)/10
...
How to get a random number between a float range?
...ndom number in the range [a, b) or [a, b] depending on rounding github.com/python/cpython/blob/…
– Pavel
Jun 4 '19 at 8:47
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Unpacking a list / tuple of pairs into two lists / tuples [duplicate]
... To the OP, stackoverflow.com/questions/5239856/foggy-on-asterisk-in-python is helpful if you don't know about the "splat" operator.
– dicato
Sep 26 '11 at 18:07
...
Negative list index? [duplicate]
... the end of the list, so n[-1] means the last item in the list n. Any good Python tutorial should have told you this.
It's an unusual convention that only a few other languages besides Python have adopted, but it is extraordinarily useful; in any other language you'll spend a lot of time writing n[...
numpy matrix vector multiplication [duplicate]
...pected, but I simply cannot find any information about how this is done in Python's Numpy module.
1 Answer
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PHP学习必看的一些书 - IT书籍推荐 - 清泛网 - 专注C/C++及内核技术
...言》经典
Golang:
《Learing Go》简单
《Go Web编程》
Python:
《Python 标准库》适合经常翻翻
《Python参考手册》 案头必读
《Python基础教程（第2版）》 基础必读
其他:
《数学之美》 文津图书奖科普获奖书，Google黑板报百...
PHP学习必看的一些书 - PHP - 清泛IT论坛，有思想、有深度
...—C/C++语言》经典
Golang:《Learing Go》简单《Go Web编程》
Python:《Python 标准库》适合经常翻翻《Python参考手册》 案头必读《Python基础教程（第2版）》 基础必读
其他:《数学之美》 文津图书奖科普获奖书，Google黑板报百万点击！...