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python Programming Glossary: pd

Parse dates when YYYYMMDD and HH are in separate columns using pandas in Python

http://stackoverflow.com/questions/11615504/parse-dates-when-yyyymmdd-and-hh-are-in-separate-columns-using-pandas-in-python

to do is from datetime import datetime import pandas as pd parse lambda x datetime.strptime x ' Y m d H' pd.read_csv .... pandas as pd parse lambda x datetime.strptime x ' Y m d H' pd.read_csv .. file.csv parse_dates 'YYYYMMDD' 'HH' index_col..

Benefits of panda's multiindex?

http://stackoverflow.com/questions/13226029/benefits-of-pandas-multiindex

a dataframe using MultiIndex like this import pandas as pd import numpy as np np.arrays 'one' 'one' 'one' 'two' 'two' 'two'.. 'one' 'one' 'one' 'two' 'two' 'two' 1 2 3 1 2 3 df pd.DataFrame np.random.randn 6 2 index pd.MultiIndex.from_tuples.. 1 2 3 1 2 3 df pd.DataFrame np.random.randn 6 2 index pd.MultiIndex.from_tuples zip np.arrays columns 'A' 'B' df # This..

Converting between datetime, Timestamp and datetime64

http://stackoverflow.com/questions/13703720/converting-between-datetime-timestamp-and-datetime64

import datetime import numpy as np import pandas as pd dt datetime.datetime 2012 5 1 # A strange way to extract a Timestamp.. extract a Timestamp object there's surely a better way ts pd.DatetimeIndex dt 0 dt64 np.datetime64 dt In 7 dt Out 7 datetime.datetime.. the datetime or Timestamp from a numpy.datetime64 dt64 . Update a somewhat nasty example in my dataset perhaps the motivating..

“Large data” work flows using pandas

http://stackoverflow.com/questions/14262433/large-data-work-flows-using-pandas

to retrieve data to feed into a pandas data structure Updating the database after manipulating pieces in pandas Real world.. is pseudocode. import numpy as np import pandas as pd # create a store store pd.HDFStore 'mystore.h5' # this is the.. numpy as np import pandas as pd # create a store store pd.HDFStore 'mystore.h5' # this is the key to your storage # this..

Heatmap in matplotlib with pcolor?

http://stackoverflow.com/questions/14391959/heatmap-in-matplotlib-with-pcolor

my python implementation of the flowingdata NBA heatmap. updated 1 4 2014 thanks everyone # coding utf 8 # nbformat 3.0 nbformat.. nbformat # # Filename heatmap.py # Date 2013 04 19 # Updated 2014 01 04 # Author @LotzJoe Joe Lotz # Description My attempt.. # # import matplotlib.pyplot as plt import pandas as pd from urllib2 import urlopen import numpy as np pylab inline..

How to trouble-shoot HDFStore Exception: cannot find the correct atom type

http://stackoverflow.com/questions/15488809/how-to-trouble-shoot-hdfstore-exception-cannot-find-the-correct-atom-type

int64 6 object 45 Code to store the dataframe In 30 store pd.HDFStore 'test0.h5' 'w' In 31 for chunk in pd.read_csv 'Train.csv'.. In 30 store pd.HDFStore 'test0.h5' 'w' In 31 for chunk in pd.read_csv 'Train.csv' chunksize 10000 .... store.append 'df'.. 21.0 Metric Tons However when I drop this column from the pd.read_csv chunks and append to my HDFStore I still get the same..

Read Specific Columns from csv file with Python csv

http://stackoverflow.com/questions/16503560/read-specific-columns-from-csv-file-with-python-csv

and save an entire column into a variable import pandas as pd df pd.read_csv csv_file saved_column df.column_name #you can.. an entire column into a variable import pandas as pd df pd.read_csv csv_file saved_column df.column_name #you can also..

Using numpy.genfromtxt to read a csv file with strings containing commas

http://stackoverflow.com/questions/17933282/using-numpy-genfromtxt-to-read-a-csv-file-with-strings-containing-commas

The default value is . An example In 1 import pandas as pd In 2 from StringIO import StringIO In 3 s year city value ..... ... 2012 Louisville KY 3.5 ... 2011 Lexington KY 4.0 In 4 pd.read_csv StringIO s quotechar ' ' skipinitialspace True Out..

Silent printing of a PDF in Python

http://stackoverflow.com/questions/4498099/silent-printing-of-a-pdf-in-python

import FindExecutable from os import spawnl P_NOWAIT ... pd C temp test.pdf pdbits os.path.split pd readerexe FindExecutable.. from os import spawnl P_NOWAIT ... pd C temp test.pdf pdbits os.path.split pd readerexe FindExecutable pdbits 1 pdbits.. from os import spawnl P_NOWAIT ... pd C temp test.pdf pdbits os.path.split pd readerexe FindExecutable pdbits 1 pdbits..

Probability distribution in Python

http://stackoverflow.com/questions/526255/probability-distribution-in-python

this process to be quite fast CPU time is limited. Thx Update Ok I tried to consider your suggestions wisely but time is.. increasing my effectiveness it is crazy. Thx Thx Thx Update2 I decided to make it more efficient by letting it choose.. have any comments suggestions please do not hesitate. Thx Update3 I have been working all day on a task tailored version of..

Appending items to a list of lists in python

http://stackoverflow.com/questions/8713620/appending-items-to-a-list-of-lists-in-python

can do this way plot_data for _ in positions for example pd for _ in range 3 pd pd 0 .append 1 pd 1 share improve this..

moving average function on numpy/scipy? [closed]

http://stackoverflow.com/questions/14313510/moving-average-function-on-numpy-scipy

# the recommended syntax to import pandas import pandas as PD # prepare some fake data # the date time indices t PD.date_range.. as PD # prepare some fake data # the date time indices t PD.date_range '1 1 2010' '12 31 2012' freq 'D' # the data x NP.arange.. 0 # combine the data index into a Pandas 'Series' object D PD.Series s t Now just call the function rolling_mean passing in..

Open a file in the proper encoding automatically

http://stackoverflow.com/questions/2342284/open-a-file-in-the-proper-encoding-automatically

that. Anyone knows a way of doing that in python 2.6 PD I hope that this will be solved in Python 3 as all the strings..

Django - Working with multiple forms

http://stackoverflow.com/questions/2374224/django-working-with-multiple-forms

Any ideas to get this stuff done Thanks for your help PD Don't pay attention to the relation between Poll and Choice..

Best programming language and framework for cross platform desktop application development? [closed]

http://stackoverflow.com/questions/4160162/best-programming-language-and-framework-for-cross-platform-desktop-application-d

Well documented A lot of plugins libs for common tasks PDF CSV XLS basic sound mp3 ogg etc Reasonable ease of setup use.. Divide them into semi independent chunks like this PD problem domain the actual functionality you're trying to perform... of these chunks with interfaces that don't change so your PD chunk interacts with the DS chunk using the same interface regardless..