I would like to download the CSV file in python ftplib.At that time, the date part of the file name changes every day, so I will search by regular expression and download it.
However, I received the following error, so please tell me how to resolve it.
TypeError: findall() missing 1 required positional argument: 'string'
import ftplib
from logging import getLogger, StreamHandler, Formatter, DEBUG
import re
## FTP Information
HOST='***.ne.jp'
PORT = 21
USER='***'
PASSWORD='***'
DIRECTORY='/***/***'
## Generating Filename to Retrieve
FILE_NAME=(re.findall('item2019????-?.csv'))#←I want to search here by regular expression!
print(FILE_NAME)
I said FILE_NAME=(re.findall('item2019????-?.csv') in re, but I didn't know what to do to make it str type.
Python 3.7.3
Windows 7
jupyter notebook
re.findall requires at least two arguments: the search pattern and the search string.
The code for the question is an error because only the search pattern is specified in the argument.
The sample code below is an excerpt of a simple file listing using ftp.nlst to find the appropriate file name in a regular expression.
We use re.match, but the arguments are similar to re.findall just because the matching method and return value are different.
import re
# items=ftp.nlst(".")# File list returned in array
items=['item201912301913-1.csv', 'item201912301913-1.xlsx', 'item2019 [8 characters are OK-!.csv', 'readme.txt'] #Regular expression sample code
For item in items:
ifre.match(r'item2019.{8}-.\.csv',item):
print(item)
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