我是python的新手,我已经达到了从大文本文件创建多个csv文件的地步。所以我的csv看起来如下。
CSV1
ABC,1
DEF,2
GHI,3
CSV2
ABC,4,DEF,5
GHI,6
以及最多15个csv文件。
我想创建一个组合的csv文件,如下所示。
ABC,1,4,
DEF,2,5
GHI,3,6
有关如何执行此操作的任何指示表示赞赏。
答案 0 :(得分:0)
假设所有CSV文件的长度相同且包含相同顺序的相同第一列,则此类内容可能对您有用:
list_of_files = ['csv1.csv', 'csv2.csv', 'csv3.csv']
# Use the first file as a template
with open(list_of_files[0], 'r') as f:
output_text = [line.strip() for line in f]
# Append the values to the end of the lines
for fn in list_of_files[1:]:
with open(fn, 'r') as f:
for i, line in enumerate(f):
key, value = line.strip().split(",")
output_text[i] += "," + value
# Dump result to new csv
with open("result.csv", 'w') as f:
f.write("\n".join(output_text))
答案 1 :(得分:0)
import csv
from collections import defaultdict
csvs = ["data1.csv", "data2.csv"]
for file in csvs:
for line in csv.reader(open(file)):
d.setdefault(line[0], []).append(line[1])
with open("result.csv", "w") as f:
wrt = csv.writer(f)
wrt.writerows([[k] + v for k, v in d.items()])