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[英]Writing python list to .txt file as a string without list formatting
[英]List and String formatting difficulties: importing a txt file, adding strings and writing it to a new file
我在使用列表和字符串格式设置时遇到麻烦,并将更改写入新文件。 我正在寻找的是:
前面和后面的STRINGS都已定义,并且所有内容都写入一个新文件!
我的最终目标是,当我导入txt文件(包含列表)并运行代码时,然后将其打印到新文件,并在导入的txt文件的列表之前和之后添加预定义的字符串。
我现在的代码如下:
text_file = open(r"text_file path", "r")
lines = text_file.read().split(',')
lines.insert(0, "String Values Before")
lines.insert("String Values After")
text_file.close()
lines.write("new_file.txt", "w+")
现在的问题是我要插入到列表中,而我希望将字符串与列表分开!
我可以使用以下代码在控制台中生成所需的书面文件:
FIRMNAME = "apple"
FILETYPE = "apple"
REPLYFILENAME = "apple"
SECMASTER = "apple"
PROGRAMNAME = "apple"
text_file = open(r"textfile path", "r+")
lines = text_file.readlines().split('\n')
print(("START-OF-FILE \nFIRMNAME= ") + FIRMNAME)
print(("FILETYPE= ") + FILETYPE)
print(("REPLYFILENAME= ") + REPLYFILENAME)
print(("SECMASTER= ") + SECMASTER)
print(("PROGRAMNAME= ") + PROGRAMNAME)
print("START-OF-FIELDS")
print("END-OF-FIELDS")
print("START-OF-DATA")
pprint.pprint(lines)
print("END-OF-DATA")
print("END-OF-FILE")
我只是不知道如何将其写入新文件! 救命!
您可以这样解决:
newFile = 'your_new_file.txt'
oldFile = 'your_old_file.txt'
# Open the new text file
with open(newFile, 'w') as new_file:
# Open the old text file
with open(oldFile, 'r') as old_file:
# Write the line before the old content
new_file.write('Line before old content\n')
# Write old content
for line in old_file.readlines():
new_file.write(line)
# Write line after old content
new_file.write('Line after old content')
您的可变lines
是list
类型,没有方法write
。
此外, insert
需要一个位置,您的第二个电话缺少。
您需要读取文件,将其与前缀和后缀值相应地合并,然后将其写入相应的输出文件:
with open("text_file_path", "r") as input_file:
text = input_file.read()
text = '\n'.join(("String Values Before", text, "String Values After"))
with open("new_file.txt", "w+") as output_file:
output_file.write(text)
使用pformat
。
pprint
before_values = ["a", "b", "c"]
data = ["1", "2", "3"]
after_values = ["d", "e", "f"]
with open("outfile.txt", "w) as outfile:
outfile.write("\n".join(before_values)) # Write before values
outfile.write(pprint.pformat(data)) # Write data list
outfile.write("\n".join(after_values)) # Write after values
最初调用insert
方法时遇到错误,因为您必须提供索引; 但是,您可以追加,加入结果列表并写入文件:
text_file = open(r"text_file path", "r")
lines = text_file.read().split(',')
lines.insert(0, "String Values Before")
lines.append("String Values After")
text_file.close()
new_file = open('text_file_path.txt', 'w')
new_file.write(','.join(lines)+'\n')
new_file.close()
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