Question

我想打印出从3个城市中每个城市记录的第一次旅行（每个数据文件的第二行）以用于自行车共享系统。但是，它仅打印一个城市，并且此错误一直显示：

AttributeError: 'builtin_function_or_method' object has no attribute 'fieldnames'

我试图搜索答案，但找不到任何内容

这是我的代码：

import csv 
from datetime import datetime 
from pprint import pprint 



def print_first_point(filename):
    """
    This function prints and returns the first data point (second row) from
    a csv file that includes a header row.
    """
    # print city name for reference
    city = filename.split('-')[0].split('/')[-1]
    print('\nCity: {}'.format(city))

    with open(filename, 'r') as f_in:
        trip_reader = csv.DictReader(f_in)
        first_trip = csv.reader.fieldnames
        pprint(first_trip)
    # output city name and first trip for later testing
    return (city, first_trip)

# list of files for each city
data_files = ['./data/NYC-CitiBike-2016.csv',
              './data/Chicago-Divvy-2016.csv',
              './data/Washington-CapitalBikeshare-2016.csv',]

# print the first trip from each file, store in dictionary
example_trips = {}
for data_file in data_files:
    city, first_trip = print_first_point(data_file)
    example_trips[city] = first_trip

Answer 1

csv.reader是必须向其传递参数的函数，当前的表示法是寻找csv.reader的变量“ fieldnames”。

例如：csv.reader（fieldnames）;

这里是示例链接。 enter link description here

AttributeError：“ builtin_function_or_method”对象没有属性“ fieldnames”

1 个答案: