如何在pandas.read_csv上的标题之前跳过未知数量的空行？

Question

I want to read a dataframe from a csv file where the header is not in the first line. For example:

In [1]: import pandas as pd

In [2]: import io

In [3]: temp=u"""#Comment 1
   ...: #Comment 2
   ...: 
   ...: #The previous line is empty
   ...: Header1|Header2|Header3
   ...: 1|2|3
   ...: 4|5|6
   ...: 7|8|9"""

In [4]: df = pd.read_csv(io.StringIO(temp), sep="|", comment="#", 
   ...:                  skiprows=4).dropna()

In [5]: df
Out[5]: 
   Header1  Header2  Header3
0        1        2        3
1        4        5        6
2        7        8        9

[3 rows x 3 columns]

The problem with the above code is that I don't now how many lines will exist before the header, therefore, I cannot use skiprows=4 as I did here.

I aware I can iterate through the file, as in the question Read pandas dataframe from csv beginning with non-fix header .

What I am looking for is a simpler solution, like making pandas.read_csv disregard any empty line and taking the first non-empty line as the header.

Answer 1

您需要设置skip_blank_lines=True

df = pd.read_csv(io.StringIO(temp), sep="|", comment="#", skip_blank_lines=True).dropna()