Question

我无法阅读行中长度不同的文件。具体来说，我知道文件长13行，第1行和第13行有2个值，其余的（2-12）有4个。我想从第1行得到一个值，从第13行得到一个值，第2-12行中的每一行取一个值，取决于它们的先前值是否等于“信用”或“借方”。由于行具有不同的长度，因此我得到“索引超出范围”错误。任何帮助将不胜感激。谢谢！

class Checkbook:
"""Checkbook class for list of check transactions"""

def __init__(self, filename):
    """initializer for Checkbook class"""

    self.name = filename
    self.debitList = []
    self.creditList = []
    self.startAmt = 0
    self.endAmt = 0
    self.shouldBeBal = 0

    with open(filename) as csvFile:
        readCSV = csv.reader(csvFile, delimiter = ',')

        #rowCount = sum(1 for row in readCSV) - 1
        #print(rowCount)

        next(csvFile)

        #in range(1, rowCount, 1):

        for row in readCSV:
            if (row[2] == " debit"):

                debitAmt = row[3]
                self.debitList.append(debitAmt)

            elif (row[2] == " credit"):
                creditAmt = row[3]
                self.creditList.append(creditAmt)

Answer 1

好吧，你必须要避开IndexError

for row in readCSV:
    if len(row) > 2:  # make sure the row is long enough
        if (row[2] == " debit"):  # now this can't fail
            # ...
        elif (row[2] == " credit"):
            # ...

或处理它：

for row in readCSV:
    try:
        if (row[2] == " debit"):
            # ...
        elif (row[2] == " credit"):
            # ...
    except IndexError:
        pass  # do nothing

无法读取包含不同列数的行的{CSV}文件

1 个答案: