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Replacing Pandas or Numpy Nan with a None to use with MysqlDB
...[2]:
0
0 1
1 NaN
In [3]: df1 = df.where(pd.notnull(df), None)
In [4]: df1
Out[4]:
0
0 1
1 None
Note: what you cannot do recast the DataFrames dtype to allow all datatypes types, using astype, and then the DataFrame fillna method:
df1 = df.astype(object).replace(np.nan, 'Non...
Using python map and other functional tools
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54
The easiest way would be not to pass bars through the different functions, but to access it dire...
What encoding/code page is cmd.exe using?
...utput in the default codepage? Total garbage!
Z:\andrew\projects\sx\1259084>chcp
Active code page: 850
Z:\andrew\projects\sx\1259084>java Foo
== UTF-8
= no bom
ASCII abcde xyz
German ├ñ├Â├╝ ├ä├û├£ ├ƒ
Polish ąęźżńł
Russian ð░ð▒...
How do I parallelize a simple Python loop?
...est using the multiprocessing module instead:
pool = multiprocessing.Pool(4)
out1, out2, out3 = zip(*pool.map(calc_stuff, range(0, 10 * offset, offset)))
Note that this won't work in the interactive interpreter.
To avoid the usual FUD around the GIL: There wouldn't be any advantage to using thre...
AngularJS : Factory and Service? [duplicate]
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4 Answers
4
Active
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Using 'starts with' selector on individual class names
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Josh StodolaJosh Stodola
76.3k4242 gold badges177177 silver badges220220 bronze badges
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How can I get the SQL of a PreparedStatement?
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174
Using prepared statements, there is no "SQL query" :
You have a statement, containing placehol...
Bootstrap NavBar with left, center or right aligned items
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848
2019 Update
Bootstrap 4
Now that Bootstrap 4 has flexbox, Navbar alignment is much easier. He...
How can I configure the font size for the tree item in the package explorer in Eclipse?
...s a policy decision on the part of the Eclipse developers (see, e.g., bugs 49548, 202091). (Grumble.) The font used is the one set by the general look-and-feel for whatever desktop you are using.
On Linux it is possible to override the system font when you invoke Eclipse. An excellent writeup of va...
AWK: Access captured group from line pattern
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edited Jun 23 '11 at 18:34
answered Jun 2 '10 at 12:50
Pet...