如何在我的輸出中索引行

Question

我的CSV文件如下（兩行以分號分隔）

01;John;231;this is row one
02;Paul;745;this is row two

我想要這樣的結果：

01  ============== column 1 and row 1
John ============= Column 2 and row 1
231 ============== column 3 and row 1
this is row one ========column 4 and row 1

依此類推，直到csv文件結束。

到現在為止，我能夠獲取列位置，但不能獲取行。

def read_csv(csvfile):
    with open(csvfile, 'rb') as file:
        columns = 4
        reader = csv.reader(file, delimiter=';')
        for row in reader:
            for column in range(0, columns):
                 print row[column], ' ====== ', 'column ', column+1, ' and row ', 

我應該在行末位置也可以放在代碼的最后一行。

謝謝

Answer 1

您可以使用枚舉 ：

def read_csv(csvfile):
    with open(csvfile, 'rb') as file:
        columns = 4
        reader = csv.reader(file, delimiter=';')
        # i will count the rows, starting at 1
        for i, row in enumerate(reader, start=1):
            for column in range(0, columns):
                 print row[column], ' ====== ', 'column ', column+1, ' and row ', i

Answer 2

您可以對兩個都使用enumerate ，並使用iterools.islice對每一行進行切片，根本就不需要使用范圍。

from itertools import islice  

with open(csvfile) as f:
    reader = csv.reader(f,delimiter=";")
    columns = 4
    for ind, row in enumerate(reader, 1):
        for ind2, column in enumerate(islice(row,columns), 1):
            print("{} ======== column {} and row {}".format(column,ind2, ind))


01 ======== column 1 and row 1
John ======== column 2 and row 1
231 ======== column 3 and row 1
this is row one ======== column 4 and row 1
02 ======== column 1 and row 2
Paul ======== column 2 and row 2
745 ======== column 3 and row 2
this is row two ======== column 4 and row 2

range默認情況下也從0開始，因此您可以簡單地使用range(columns) ，也可以進行常規切片enumerate(row[:columns],1)