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Combine two columns of text in pandas dataframe
...
Small data-sets (< 150rows)
[''.join(i) for i in zip(df["Year"].map(str),df["quarter"])]
or slightly slower but more compact:
df.Year.str.cat(df.quarter)
Larger data sets (> 150rows)
df['Year'].astype(str) + df['quarter']
UPDATE: Timing graph Pandas 0.23.4
Let's tes...
Getting a map() to return a list in Python 3.x
...e needs to be a general posting on list comprehensions, generators, map(), zip(), and a lot of other speedy iteration goodness in python.
– hughdbrown
Aug 20 '09 at 0:55
46
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How to use filter, map, and reduce in Python 3
...ager
def noiters(*funcs):
if not funcs:
funcs = [map, filter, zip] # etc
from functools import reduce
globals()[reduce.__name__] = reduce
for func in funcs:
globals()[func.__name__] = lambda *ar, func = func, **kwar: list(func(*ar, **kwar))
try:
yield
...
How to make MySQL handle UTF-8 properly
... tables/columns -- except columns that are strictly ascii/hex/country_code/zip_code/etc.
<meta charset charset=UTF-8> if you are outputting to HTML. (Yes the spelling is different here.)
More info ;
UTF8 all the way
The above links provide the "detailed canonical answer is required to addr...
Python matplotlib multiple bars
...ut using pandas and seaborn can save you a lot of time:
df = pd.DataFrame(zip(x*3, ["y"]*3+["z"]*3+["k"]*3, y+z+k), columns=["time", "kind", "data"])
plt.figure(figsize=(10, 6))
sns.barplot(x="time", hue="kind", y="data", data=df)
plt.show()
...
How can I produce an effect similar to the iOS 7 blur view?
...ds/download.action?path=wwdc_2013/wwdc_2013_sample_code/ios_uiimageeffects.zip
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Why does “pip install” inside Python raise a SyntaxError?
...n exe to run it with default python interpreter. By opening pip.exe with 7-zip you can see main.py importing pip, sys and re modules... (And there you'll find the answer how to run it within a python shell)--> pip is a regular python module. Don't forget windows wasn't first platform supporting p...
How do I parallelize a simple Python loop?
...cessing 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 threads for this example a...
Putty: Getting Server refused our key Error
...name
This fixed the problem.
Other Useful links:
Download OpenSSH-Win32.zip from: https://github.com/PowerShell/Win32-OpenSSH/releases
C# example of how to use the WinSCPnet.dll to make a connection to the OpenSSH server: https://winscp.net/eng/docs/library#csharp
Here is the code snippet to ma...
How can I backup a remote SQL Server database to a local drive?
...u can do is create a backup on the remote server machine, and have someone zip it up and send it to you.
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