使用python迭代并填充excel中的列的正确方法

Question

Okay I need some help. This was supposed to iterate through the 35,021 rows of an excel spreadsheet and populate the column drg_id from the DRG.xlsx into a cvs sheet . Instead it only populated just the original 7 items into 7 of the 35,021 rows in a new column. What am I doing wrong?

drg = pd.read_excel('C:/Cardiac DRG.xlsx', sheet_name=0, index_col=0)
list_A = drg['DRG'].tolist()
print(list_A)
series_A = pd.Series(list_A)
##Add in  the DRG to the next empty column
##df['DRG'] = series_A.values
drg_list = []
drgs = list_A 
##series_A #unique names in user_id column
drg_id_col = list(drg['DRG']) #assign column to list
def rand_reviewer(list_of_drgs):#function to generate rand user
    return list_of_drgs[random.randint(0,35021)]
for i in range(35021, len(drgs)): #iterate over list 
    drg_list.append(rand_reviewer(drgs))
    while drg_id_col[i] == drg_list[i]: #generate random user until id's don't match
        drg_list[i] = rand_reviewer(drgs)
series_B = pd.Series(drg_id_col)
df3['drg_id'] = series_B  ##add new column to df

Answer 1

This extracts the DRG column from drg , and populates a new column in df3 with random selections from that column. That seems to be what your code was trying to do.

drg = pd.read_excel('C:/Cardiac DRG.xlsx', sheet_name=0, index_col=0)
list_A = drg['DRG'].tolist()
df3['drg_id'] = random.choices(list_A, k=len(df3.index))