python合並CSV

 

 

import pandas as pd
import os

#文件路徑注意用\\
inputfilepath = "D:Users/myapp/ccd/"
outputfilepath ="D:Users/myapp/ccd/"
df_filename = "2020-08-31.csv"
columns_list = ['時間', '陽極左', '陽極右', '陰極左', '陰極右', '隔膜左', '隔膜右', '陽極中', '陰極中', '隔膜中', '陰陽中心線差', '陽極寬度', '陰極極寬度', '隔膜寬度', '陽極放卷軸', '陰極放卷軸', '上隔膜放卷軸', '下隔膜放卷軸', '陽左_陰左', '陽左_隔左', 'CPC功能', '插片角度功能']

#先創建一個只有表頭列名的空dataframe，保存為csv
df = pd.DataFrame(columns = columns_list)
df.to_csv(outputfilepath + df_filename,encoding="utf_8_sig")

#遍歷輸入路徑文件夾，用pandas讀取后追加在目標csv文件中
for inputfile in os.listdir(inputfilepath):
    df = pd.read_csv(inputfilepath+inputfile,encoding='gbk',error_bad_lines=False)
    df.to_csv(outputfilepath + df_filename, mode="a", index=True,header = False)

#查看合並后的表格
pd.read_csv(outputfilepath + df_filename)