Question

尝试打印expensedate时出现以下错误。

Traceback (most recent call last):
  File "expense.py", line 36, in <module>
    print_expense_month('nov16')
  File "expense.py", line 31, in print_expense_month
    print expensedate + " | " + description + " | " + "%.2f" % (cost)
TypeError: unsupported operand type(s) for +: 'datetime.datetime' and 'str'

第34行是下面的print行。我只想打印日期。

while description is not None:
    expensedate = sheet.cell(row = i, column = COLUMN_DATE).value
    description = sheet.cell(row = i, column = COLUMN_DESCRIPTION).value
    cost = sheet.cell(row=i, column=COLUMN_COST).value

    #expensedate format = 2016-11-01 00:00:00

    if description is not None:
        print expensedate + " | " + description + " | " + "%.2f" % (cost)

    i = i + 1

Answer 1

如果您想要的只是打印件，请从

更改打印行

print expensedate + " | " + description + " | " + "%.2f" % (cost)

到

print "%s | %s | %.2f" % (expensedate, description, cost)

Answer 2

您的问题是，您尝试将datetime类型添加到str。在python中，您需要转换类型。

print str(expensedate) + " | " + description + " | " + "%.2f" % (cost)

如果您想要不同的日期时间格式，请使用strftime https://docs.python.org/2/library/datetime.html#datetime.date.strftime

另外我建议使用string's format而不是字符串连接，这是更多功能完整且没有类型问题

print "{} | {} | {:.2f}".format(expensedate, description, cost)

TypeError：+：'datetime.datetime'和'str'的不支持的操作数类型

2 个答案: