如何使用phyton pandas合并CSV文件中的每N行

Question

I have long rows of data where each of them contains a single character of a number and I want to merge every 5 rows of data into 1 using python.

for example:

A      Result

1      12335
2      23352
3      33525
3      35251
5      ...
2      ...
5      ... 
1      ...

the first result contains rows from 1 to 5 and the second result contains rows from 2 to 6 . Can someone help me with that? Any answer would be appreciated!

Answer 1

something like this should work:

df = pd.DataFrame({'input' : ['1','2','3','4','5','6','7']})
df['result'] = df['input']
for i in range (1,6):
    df['result'] = df['result'] + df['input'].shift(-i)

Answer 2

这也可以，但不是很优雅

dz = df.iloc[0::5,:].reset_index(drop=True)+df.iloc[1::5,:].reset_index(drop=True)+df.iloc[2::5,:].reset_index(drop=True)+df.iloc[3::5,:].reset_index(drop=True)+df.iloc[4::5,:].reset_index(drop=True)