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How can strings be concatenated?
...may find it useful - you can concatenate more than one string in one go:
>>> a='rabbit'
>>> b='fox'
>>> print '%s and %s' %(a,b)
rabbit and fox
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Intellij reformat on file save
...tely, the "reformat code" would do only a subset of the things that "Code > Reformat code" does (at least for Scala code). Why is that?
– Thilo
Aug 24 '16 at 0:02
...
Using Python String Formatting with Lists
...thod of python. You could then define your formatting string like this :
>>> s = '{0} BLAH BLAH {1} BLAH {2} BLAH BLIH BLEH'
>>> x = ['1', '2', '3']
>>> print s.format(*x)
'1 BLAH BLAH 2 BLAH 3 BLAH BLIH BLEH'
...
Relationship between SciPy and NumPy
...is
module provide the mathematically valid answers in the complex plane:
>>> import math
>>> from numpy.lib import scimath
>>> scimath.log(-math.exp(1)) == (1+1j*math.pi)
True
Similarly, sqrt(), other base logarithms, power() and trig functions are
correctly handled. Se...
【HarmonyOS】编译、测试全流程 - HarmonyOS NEXT - 清泛IT社区，为创新赋能！
...应用（AGC）
1. 登录 AGC 控制台
2. 点击「我的项目」->「添加项目」，输入项目名称
3. 在项目下添加应用，选择平台为 HarmonyOS NEXT
4. 填写应用名称和包名（格式建议：cn.fun123.你的项目名）
3.2 两类证书
（1）调试证书...
Find where python is installed (if it isn't default dir)
...32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.executable
'c:\\Python26\\python.exe'
>>> sys.exec_prefix
'c:\\Python26'
>>>
>>> print '\n'.join(sys.path)
c:\Python26\lib\site-packages\setuptools-0.6c11-py...
Print PHP Call Stack
...ce, get you an array like this one (quoting the manual) :
array(2) {
[0]=>
array(4) {
["file"] => string(10) "/tmp/a.php"
["line"] => int(10)
["function"] => string(6) "a_test"
["args"]=>
array(1) {
[0] => &string(6) "friend"
}
}
[1]=>
array(4)...
How to properly ignore exceptions
...u are interested in. In the case of shutil.rmtree it's probably OSError:
>>> shutil.rmtree("/fake/dir")
Traceback (most recent call last):
[...]
OSError: [Errno 2] No such file or directory: '/fake/dir'
If you want to silently ignore that error, you would do:
try:
shutil.rmtree(...
Scala best way of turning a Collection into a Map-by-key?
...
You can use
c map (t => t.getP -> t) toMap
but be aware that this needs 2 traversals.
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Initializing a list to a known number of elements in Python [duplicate]
...
Resizing lists is slow. The following results are not very surprising:
>>> N = 10**6
>>> %timeit a = [None] * N
100 loops, best of 3: 7.41 ms per loop
>>> %timeit a = [None for x in xrange(N)]
10 loops, best of 3: 30 ms per loop
>>> %timeit a = [None for x i...