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列表和字符串格式的困难:导入txt文件、添加字符串并将其写入新文件

file-writing formatting list string python

1

A. Blackmagic · 技术社区 · 9 年前

之前的字符串
导入的txt文件内容(字符串值列表)
之后的字符串

其中,前面和后面的字符串都已定义,并且所有内容都将写入一个新文件!

我的最终目标是,当我导入一个txt文件(包含一个列表)并运行代码时,它将被打印到一个新文件中,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。

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,我正在插入到列表中,而我希望字符串与列表分开!

我已经能够使用以下代码在控制台中生成我想要的编写文件:

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")

我就是不知道怎么把它写进一个新文件!帮助

4 回复 | 直到 9 年前

1

2

Michael Gecht 9 年前

你可以这样解决:

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')

2

1

Richard Neumann 9 年前

您的变量 lines list ,它没有方法 write .
此外 insert

您需要读取文件,相应地使用前缀和后缀值连接它,然后将其写入适当的输出文件:

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)

3

1

Neo 9 年前

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

4

0

Ajax1234 9 年前

insert 方法,因为您必须提供索引;但是,您可以添加、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()