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Escaping regex string
...
336
Use the re.escape() function for this:
4.2.3 re Module Contents
escape(string)
Retur...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
... from pandas import *
In [2]: def calculate(x):
...: return x*2, x*3
...:
In [3]: df = DataFrame({'a': [1,2,3], 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], df["A2"] = zip(*df["a"].map(calculate))
In [6]: df
Out[6]:
a b A1 A2
0 1 2 2...
Difference between '..' (double-dot) and '…' (triple-dot) in range generation?
... |
edited Dec 21 '16 at 0:33
answered Mar 13 '12 at 19:48
A...
How to split a sequence into two pieces by predicate?
...
By using partition method:
scala> List(1,2,3,4).partition(x => x % 2 == 0)
res0: (List[Int], List[Int]) = (List(2, 4),List(1, 3))
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...
Emulate ggplot2 default color palette
...lt color palette for a desired number of colors. For example, an input of 3 would produce a character vector of HEX colors with these colors:
...
Converting a column within pandas dataframe from int to string
...hape(5,2),columns=list('AB'))
In [17]: df
Out[17]:
A B
0 0 1
1 2 3
2 4 5
3 6 7
4 8 9
In [18]: df.dtypes
Out[18]:
A int64
B int64
dtype: object
Convert a series
In [19]: df['A'].apply(str)
Out[19]:
0 0
1 2
2 4
3 6
4 8
Name: A, dtype: object
In [20]: df['A...
warning: implicit declaration of function
...
236
You are using a function for which the compiler has not seen a declaration ("prototype") yet.
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Why declare unicode by string in python?
...file you've saved is utf-8. The default for Python 2 is ASCII (for Python 3 it's utf-8). This just affects how the interpreter reads the characters in the file.
In general, it's probably not the best idea to embed high unicode characters into your file no matter what the encoding is; you can use ...
Pelican 3.3 pelican-quickstart error “ValueError: unknown locale: UTF-8”
When I was trying to use pelican3.3, I typed the commend "pelican-quickstart", some errors showed up.
6 Answers
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