Python Playground

I have large csv files with size more than 10 mb each and about 50+ such files. These inputs have m… Read more Pandas.io.common.cparsererror: Error Tokenizing Data. C Error: Buffer Overflow Caught - Possible Malformed Input File

I have two sets of numerical data. One is much larger than the other. The same data from the smalle… Read more Pandas: Duplicate Rows From Small Dataframe To Large Based On Cell Value

(Assume that: application start-up time is absolutely critical; my application is started a lot; my… Read more How To Concatenate Multiple Python Source Files Into A Single File?

Given the following: df = pd.DataFrame({'col1' : ['a','b'], … Read more Concatenate Cells Into A String With Separator Pandas Python

I'm working through Udacity and Dave Evans introduced an exercise about list properties list1 =… Read more Why Does Not The + Operator Change A List While .append() Does?

Does anyone meet this FutureWarning when you use Tiingo+pandas_datareader? The warning is like: pyt… Read more Why Do I Get A 'futurewarning' With Pandas.concat?

EDIT: I was careless in my original examples. The behaviour occurs not when I add list A to itself,… Read more Ellipsis Lists [...] And Concatenating A List To Itself

Taking this snippet from interactivepython.org: def test1(): # concat l = [] for i in rang… Read more Python Concatenation Vs Append Speed On Lists