Question

假设我具有以下数据集

10,"XG16008168",9/12/2017 0:00:00,9/13/2017 0:00:00,2/23/2018 0:00:00,"Whatever","07210","25978","Main","Yes",3/9/2018 0:00:00,,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,0,,0,0,0,0,0,0,0,0,0,1,,0,,0,,0,0,0,0,0,1,0,0,0,0,0,0,,0,
11,"X000000000",11/30/2017 0:00:00,9/25/2017 0:00:00,2/27/2018 0:00:00,"Whatever 004","07210","25978","Main","Yes",3/9/2018 0:00:00,,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,0,,0,0,0,0,0,0,0,0,0,1,"Missing valve number.",0,,0,,0,0,0,0,0,0,1,0,0,0,0,0,,0,

我使用以下方法读取了此CSV文件：

with open("AccessTable.txt", "r") as RTCData:
    with open("RTCOutput.csv", "w") as RTCOutput:
        ALLRows = csv.reader(RTCData, delimiter=',')

        for row in ALLRows:
            rows.append(row)

            print(row[1][1])

我正在尝试打印CSV文件的元素。

因此，通过打印row[1][1]我本来期望"X000000000"，但是却得到"1"，它是"11"中的第二个字符。

能否请您告诉我如何吐出如何提取元素？

Answer 1

您正在使用row [1] [1]，但它应该是row [1]。

尝试在python shell中打印行，您将能够轻松地分析内容。每个项目的示例索引值，行是项目列表。

with open("/home/lavanya/Desktop/AccessTable.txt", "r") as RTCData:

    with open("RTCOutput.csv", "w") as RTCOutput:

        ALLRows = csv.reader(RTCData, delimiter=',')

        for row in ALLRows:

            rows.append(row)
            print row
            print(row[1][1])

Answer 2

您显示的是row，而不是rows，因此您显示的是每行第二个元素中的字符。

Answer 3

>>> import csv
>>> with open('eggs.csv', 'rb') as csvfile:
...     spamreader = csv.reader(csvfile, delimiter=' ', quotechar='|')
...     for row in spamreader:
...         print(', '.join(row))
Spam, Spam, Spam, Spam, Spam, Baked Beans
Spam, Lovely Spam, Wonderful Spam

Answer 4

只需一点点清理，以备将来使用和回答。使用for row in ALLRows:语句时，已经在所有行中进行迭代。这意味着row现在包含：

11,"X000000000",11/30/2017 0:00:00,9/25/2017 0:00:00,2/27/2018 0:00:00,"Whatever 004","07210","25978","Main","Yes",3/9/2018 0:00:00,,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,,0,,0,0,0,0,0,0,0,0,0,1,"Missing valve number.",0,,0,,0,0,0,0,0,0,1,0,0,0,0,0,,0,

如果要遍历THAT的各个项目，则可以执行以下操作

# Put both open statements on a single line.  A bit cleaner, but does the same thing.
with open("AccessTable.txt", "r") as RTCData, open("RTCOutput.csv", "w") as RTCOutput:
    ALLRows = csv.reader(RTCData, delimiter=',')

    # Make a huge array from the CSV file
    rows = [row for row in ALLRows]
    rows.append(row)

    # OR
    for row in ALLRows:
        # Iterate through all of the cells of this row
        for cell in row:
            print(cell)

        # And to access a single item of the row:
        part_number = row[1]

祝你好运！

使用python读取CSV文件时打印特定元素

4 个答案: