How can I get back to the first column again after iterating over all the columns of a Pandas datafr-CodePudding

In the code below I'm iterating over the columns of a Pandas dataframe. For each column I did some operations. After doing operations on the last column I want to get back to the first column of the dataframe and again iterate over each column one by one from an increased location of j 512. How can I do that?

for column in df:
    j=0
    col_one_list = df[column].tolist()
    mav1 = mav(col_one_list[j:j 256])
    mav2 = mav(col_one_list[j 256:j 256 256])

CodePudding user response：

loop_time = 3
j = 0
for i in range(loop_time):
    for column in df:
        col_one_list = df[column].tolist()
        mav1 = mav(col_one_list[j:j 256])
        mav2 = mav(col_one_list[j 256:j 256 256])
    
    j =512