Pandas continues update csv

def appendDFToCSV_void(df, csvFilePath, sep=","):
    import os
    if not os.path.isfile(csvFilePath):
        df.to_csv(csvFilePath, mode='a', index=False, sep=sep)
    elif len(df.columns) != len(pd.read_csv(csvFilePath, nrows=1, sep=sep).columns):
        raise Exception("Columns do not match!! Dataframe has " + str(len(df.columns)) + " columns. CSV file has " + str(len(pd.read_csv(csvFilePath, nrows=1, sep=sep).columns)) + " columns.")
    elif not (df.columns == pd.read_csv(csvFilePath, nrows=1, sep=sep).columns).all():
        raise Exception("Columns and column order of dataframe and csv file do not match!!")
    else:
        df.to_csv(csvFilePath, mode='a', index=False, sep=sep, header=False)

Source: stackoverflow.com

Pandas continues update csv

In [1]: df = pd.read_csv('foo.csv', index_col=0)

In [2]: df
Out[2]:
   A  B  C
0  1  2  3
1  4  5  6

In [3]: df + 6
Out[3]:
    A   B   C
0   7   8   9
1  10  11  12

In [4]: with open('foo.csv', 'a') as f:
             (df + 6).to_csv(f, header=False)

Source: stackoverflow.com

Similar codes

0 vote138 views1 answer
Cieling function pandas
Python
0 vote148 views1 answer
Python String with Alphanumeric characters
Python
3 votes172 views1 answer
Pandas fill na with value from another column
Python
0 vote184 views1 answer
Create an array of n same value python
Python
0 vote166 views1 answer
How to make reportlab table header bold in python
Python
16 votes161 views5 answers
Convert pandas dataframe/ table to python dictionary
Python
3 votes208 views3 answers
AttributeError: 'str' object has no attribute 'decode' site:stackoverflow.com
Python
0 vote179 views1 answer
Django create object with default today date
Python Django
-1 vote169 views1 answer
How to create templates in python
Python
1 vote164 views1 answer
Deleting all rows in pandas
Python