读取两个 csv 文件并比较每一行。如果行匹配打印两行，如果不相似则打印无效

Question

import csv

f1 = open("file1.csv")

f2 = open("file2.csv")

csv_f1 = csv.reader(f1)

csv_f2 = csv.reader(f2)

for row1 in csv_f1: 
    for row2 in csv_f2:
        if row1 == row2:
            print row1[0], row2[0]
        else:
            print row1[0], "Invalid"

此程序未打印出第 1 行、第 2 行。它只是打印 file1 的第一行并且在同一行多次无效。

Answer 1

您需要比较相应的行，而不是每一行与每一行，这是您的代码现在所做的。

from __future__ import print_function

import csv
import itertools
import sys

# Select the right function based on whether we are in Python 2 or 3.
if sys.version_info.major == 2:
    zip_longest = itertools.izip_longest
else:
    zip_longest = itertools.zip_longest

f1 = open("file1.csv")
f2 = open("file2.csv")

csv_f1 = csv.reader(f1)
csv_f2 = csv.reader(f2)

for row1, row2 in zip_longest(csv_f1, csv_f2):
    if row1 == row2:
        print(row1[0], row2[0])
    else:
        print(row1[0], "Invalid")

Answer 2

读取两个 CSV 文件并创建以行号为键、以行为值的字典
file1 上的迭代器，即 root1 并与 file2 进行比较，即 root2 具有相同的键。
当 file1 的条目多于 file2 时处理异常。

代码：

import csv
with open("/home/infogrid/Desktop/file1.csv", "rb") as fp1:
    root = csv.reader(fp1,)
    root1 = {}
    for i in root:
        root1[root.line_num] = i
    
with open("/home/infogrid/Desktop/file2.csv", "rb") as fp1:
    root = csv.reader(fp1,)
    root2 = {}
    for i in root:
        root2[root.line_num] = i

for i in root1:
    try:
        if root1[i]==root2[i]:
            print root1[i], root1[i]
        else:
            print root1[i], "Invalid"
    except:
        print root1[i], "Invalid"

输出：

['test1', 'test3', 'test4'] ['test1', 'test3', 'test4']
['test1', 'test5', 'test4'] Invalid
['test1', 'test3', 'test4'] ['test1', 'test3', 'test4']
['test1', 'test3', 'test4'] Invalid

读取两个 csv 文件并比较每一行。如果行匹配打印两行，如果不相似则打印无效

Read two csv files and compare every line. If the lines match print both lines, if it isn't similar print invalid

python