Question

在我的程序中，我向用户询问一个数字，然后继续使用DictReader读取csv文件。我想输出csv文件中大于用户数的值....

import csv

limit_amount = raw_input("Please Enter a Limit Amount: ")

with open("transactionsample.csv","rb") as my_file:
    reader = csv.DictReader(my_file)
    for row in reader:
        print row

Answer 1

import csv

limit_amount = int(raw_input("Please Enter a Limit Amount: ")) #convert limit_amount from string to int

with open("transactionsample.csv") as my_file: #rb is really unnecessary
    reader = csv.DictReader(my_file)
    for row in reader:
        for k in row: #check each cell
            if row[k].isdigit() and int(row[k]) > limit_amount: #validation and comparison 
                print row[k]

Answer 2

您要做的是根据用户输入row测试您正在阅读的limit_amount的值。为此，你需要知道哪一列＆＃39;您正在比较用户输入，让我们说您要查找的值是索引2：

import csv

limit_amount = raw_input("Please Enter a Limit Amount: ")

with open("transactionsample.csv","rb") as my_file:
    reader = csv.DictReader(my_file)
    for row in reader:
        if row[2] >= limit_amount: # you might have to change the if condition to match exactly what you want
            print row

你如何读取csv文件中的数据并打印特定的数据？

2 个答案: