第一则
"""
批量给指定文件夹内的所有.csv文件增加表头后转成txt
"""
import os
def add_header_and_convert_to_txt(csv_folder, header, output_folder):
csv_files = [f for f in os.listdir(csv_folder) if f.endswith('.csv')]
for csv_file in csv_files:
csv_file_path = os.path.join(csv_folder, csv_file)
txt_file_name = os.path.splitext(csv_file)[0] + '.txt'
txt_file_name = os.path.basename(txt_file_name)
txt_file_path = os.path.join(output_folder, txt_file_name)
with open(csv_file_path, 'r', encoding='utf-8') as csv_file:
lines = csv_file.readlines()
lines.insert(0, header + '\n')
with open(txt_file_path, 'w', encoding='utf-8') as txt_file:
txt_file.writelines(lines)
print('添加表头并转换为.txt文件完成。')
csv_folder_path = 'your_folder_path'
header = 'column1,column2,column3,column4,column5,column6,column7,column8,column9,column10,column11,column12,column13,column14,column15,column16,column17,column18,column19,column20'
output_folder_path = 'your_output_folder_path'
add_header_and_convert_to_txt(csv_folder_path, header, output_folder_path)
第二则
"""
给文件夹内特定的.csv文件添加表头后转成txt
"""
import os
def add_header_and_convert_to_txt(csv_folder, target_files, header):
for file_name in os.listdir(csv_folder):
file_path = os.path.join(csv_folder, file_name)
if file_name.endswith('.csv') and file_name in target_files:
txt_file_path = os.path.splitext(file_path)[0] + '.txt'
with open(file_path, 'r', encoding='utf-8') as csv_file:
lines = csv_file.readlines()
lines.insert(0, header + '\n')
with open(txt_file_path, 'w', encoding='utf-8') as txt_file:
txt_file.writelines(lines)
print('添加表头并转换为 .txt 文件完成。')
csv_folder_path = 'your_folder_path'
target_csv_files = ['file1.csv', 'file2.csv']
header = 'column1,column2,column3,column4,column5'
add_header_and_convert_to_txt(csv_folder_path, target_csv_files, header)
第三则
"""
根据特定日期,在文件夹内获取特定的.csv文件添加表头后转成txt
"""
import os
import re
import datetime
def add_header_and_convert_to_txt(csv_folder, target_date, header):
pattern = re.compile(r'\d{8}\.csv$')
for file_name in os.listdir(csv_folder):
if os.path.isfile(os.path.join(csv_folder, file_name)):
if pattern.match(file_name):
date_str = file_name.split('.')[0][-8:]
file_date = datetime.datetime.strptime(date_str, '%Y%m%d').date()
if file_date == target_date:
csv_file_path = os.path.join(csv_folder, file_name)
txt_file_path = os.path.splitext(csv_file_path)[0] + '.txt'
with open(csv_file_path, 'r', encoding='utf-8') as csv_file:
lines = csv_file.readlines()
lines.insert(0, header + '\n')
with open(txt_file_path, 'w', encoding='utf-8') as txt_file:
txt_file.writelines(lines)
print(f'已处理文件:{file_name}')
print('添加表头并转换为 .txt 文件完成。')
csv_folder_path = 'your_folder_path'
target_date_str = '20230101'
header = 'column1,column2,column3,column4,column5'
target_date = datetime.datetime.strptime(target_date_str, '%Y%m%d').date()
add_header_and_convert_to_txt(csv_folder_path, target_date, header)
for循环的两种不常见用法
for num in reversed(range(0, 31)):
print(num)
for num in range(30, 0, -1):
print(num)