TypeError:“发电机"对象不可下标,CSV文件 [英] TypeError: 'generator' object is not subscriptable, csv file
问题描述
我遇到了typeerror:当尝试在多个csv文件中列出信息列表,对其进行排序时,"generator"对象无法下标,以便获得所需的信息并将该信息放入新的.xlsx文件中.我想知道这里是否有人可以帮助我解决我的问题所在.是无法访问的csv文件,还是我的代码有问题? (我没有添加整个代码,仅添加了出现错误的代码)
I am getting the typeerror: 'generator' object is not subscriptable when trying to make lists of information in several csv files, sort them so that I get the information I need and put that information into a new .xlsx file. I am wondering if anyone here can help me with where I am going wrong. Is it the csv files that cannot be accessed or is there something wrong with my code? (I did not add the entire code, only the code where I get the error)
代码:
import csv
import operator
from openpyxl import Workbook, load_workbook
import os
import logging
def opencsv(csvfile):
csvdata = []
with open(csvfile, encoding='utf-8-sig') as csv_input:
try:
reader = csv.reader(csv_input, delimiter=';')
for row in reader:
key_1 = row[0]
key_2 = row[1]
1_2 = key_1.split(';')
2_1 = key_2.split(';')
csvdata.append(list+link)
sortedlist = sorted(csvdata, key=operator.itemgetter(0),
reverse=False)
return sortedlist
finally:
csv_input.close()
def copycsv(excel_file, csvfile):
rel_path_xlsx = r'C:\Myfolder\xlsx'
rel_path_csv = r'C:\Myfolder\CSV'
wb1 = load_workbook(rel_path_xlsx+"\\"+excel_file)
wb2 = Workbook()
ws1 = wb1.active
ws2 = wb2.active
sortedlist = opencsv(rel_path_csv+"\\"+csvfile)
listed = sorted(sortedlist, key=operator.itemgetter(0), reverse=False)
for info in listed:
ws2.append(info)
col_v = ws2.columns[0] #line 39, error
col_n = ws2.columns[1]
for idx, cell in enumerate(col_v, 1):
ws1.cell(row=idx, column=4).value = cell.value
for idx, cell in enumerate(col_n, 1):
ws1.cell(row=idx, column=5).value = cell.value
wb1.save(r"C:\Myfolder"+"\\"+"file_"+excel_file)
def copyxlsx(rel_path_xlsx, rel_path_csv):
for filename in zip(sorted(os.listdir(rel_path_xlsx)),
sorted(os.listdir(rel_path_csv))):
print(filename[0], filename[1])
copycsv(filename[0], filename[1]) #line 55, error
Traceback (most recent call last):
line 55, in copyxlsx
copycsv(filename[0], filename[1])
line 39, in copycsv
col_v =ws2.columns[0]
TypeError: 'generator' object is not subscriptable
我对python还是很陌生,所以任何帮助将不胜感激!使用Python3.4.1
I am quite new to python, so any help will be highly appreciated! Working in Python3.4.1
推荐答案
worksheet.columns
返回生成器(错误提示).您需要将其转换为可下标的对象(即列表或元组),以便按索引获取列:
worksheet.columns
returns a generator (as the error suggests). You'll need to convert it to a subscriptable object (ie list or tuple) in order to get a column by index:
cols = tuple(ws2.columns)
col_v = cols[0]
col_n = cols[1]
甚至更好,假设只有两列:
Or even better, assuming there are only 2 columns:
col_v, col_n = tuple(ws2.columns)
或者如果有多于2列,则您不需要关心其余的内容,而无需使用Python 3:
Or if there are more than 2 columns, you don't care about the rest and using Python 3:
col_v, col_n, *_ = tuple(ws2.columns)
请注意,这将在内存中创建一个无用的列表.您也可以做
col_v, col_n = tuple(ws2.columns)[:2]
可在Python 2和3中使用,并且不会在内存中创建不必要的列表.
Note this will create a useless list in memory. You could also do
col_v, col_n = tuple(ws2.columns)[:2]
that works in both Python 2 and 3, and won't create a needless list in memory.
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