我是 python 新手，我需要一些帮助。我制作了一个 python 脚本，它从一个文件中获取两列并将它们复制到一个“新文件”中。但是，我不时需要向“新文件”添加列。我需要在侧面而不是底部添加列。我的脚本将它们添加到底部。有人建议使用 CSV，我读过它，但我无法将新列添加到先前列的一侧。非常感谢任何帮助。
这是我写的代码：
import sys
import re
filetoread = sys.argv[1]
filetowrite = sys.argv[2]
newfile = str(filetowrite) + ".txt"
openold = open(filetoread,"r")
opennew = open(newfile,"a")
rline = openold.readlines()
number = int(len(rline))
start = 0
for i in range (len(rline)) :
if "2theta" in rline[i] :
start = i
for line in rline[start + 1 : number] :
words = line.split()
word1 = words[1]
word2 = words[2]
opennew.write (word1 + " " + word2 + "\n")
openold.close()
opennew.close()
这是我使用 CSV 编写的第二个代码：
import sys
import re
import csv
filetoread = sys.argv[1]
filetowrite = sys.argv[2]
newfile = str(filetowrite) + ".txt"
openold = open(filetoread,"r")
rline = openold.readlines()
number = int(len(rline))
start = 0
for i in range (len(rline)) :
if "2theta" in rline[i] :
start = i
words1 = []
words2 = []
for line in rline[start + 1 : number] :
words = line.split()
word1 = words[1]
word2 = words[2]
words1.append([word1])
words2.append([word2])
with open(newfile, 'wb') as file:
writer = csv.writer(file, delimiter= "\n")
writer.writerow(words1)
writer.writerow(words2)
这些是输入文件的一些示例：
我的第一个脚本“几乎”工作得很好，除了它将新列写在底部并且我需要它们在前面的列旁边。