csv文件中的行计数 [英] Row count in a csv file

问题描述

我可能犯了一个愚蠢的错误，但我找不到它在哪里。我想计算我的csv文件中的行数。我写了这个，显然是不工作：我有 row_count = 0 ，而它应该是400.欢呼。

I am probably making a stupid mistake, but I can't find where it is. I want to count the number of lines in my csv file. I wrote this, and obviously isn't working: I have row_count = 0 while it should be 400. Cheers.

f = open(adresse,"r")
reader = csv.reader(f,delimiter = ",")
data = [l for l in reader]
row_count = sum(1 for row in reader)

print row_count

reader = csv.reader（f，delimiter =。）;解决方法

解决方案

with open(adresse,"r") as f:
    reader = csv.reader(f,delimiter = ",")
    data = list(reader)
    row_count = len(data)

在保存数据列表后，当文件指针已到达文件末尾时，您试图读取文件两次。

You are trying to read the file twice, when the file pointer has already reached the end of file after saving the data list.

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