Python 编码文本文件，打开它，替换多个部分并输出没有空行的文本格式为.csv 样式

Question

我有一个文件 "test.xls"，它基本上是一个旧的 xls（xml 格式），在记事本中看起来像这样：

<table cellspacing="1" rules="all" border="1">
    <tr>
        <td>Row A</td><td>Row B</td><td>Row C</td>
    </tr>
    <tr>
        <td>New York</td><td>23</td><td>warm</td>
    </tr>
    <tr>
        <td>San Francisco</td><td>40</td><td>hot</td>
    </tr>
</table>

现在我正在使用 Python 将其转换为 .txt（平面文件），稍后我可以将其导入我的 MSSQL 数据库。

我目前拥有的：

import codecs
import os

# read the file with a specific encoding
with codecs.open('test.xls', 'r', encoding = 'ansi') as file_in, codecs.open('test_out.txt', 'w') as file_out:
    lines = file_in.read()
    lines = lines.replace('<tr>', '')

    # save the manipulated data into a new file with new encoding
    file_out.write(lines)

这种方法生成的 .txt 如下所示：

Row A;Row B;Row C

New York;23;warm

San Francisco;40;hot

我试过多种方法去掉空行，最后一个是：

for lines in file_in:
        if line != '\n':
            file_out.write(lines)

但是文件要么看起来一样，要么完全是空的

Answer 1

去除空行：

list.txt:

Row A;Row B;Row C

New York;23;warm

San Francisco;40;hot

因此:

logFile = "list.txt"
with open(logFile) as f:
    content = f.readlines()

# to remove empty lines
content = [l.strip() for l in content if l.strip()]
for line in content:
    print(line)

输出:

Row A;Row B;Row C
New York;23;warm
San Francisco;40;hot

编辑:

也许，从文件中读取然后覆盖它，使用存储结果的列表，稍后可以将结果写入文件。

logFile = "list.txt"                # your file name
results = []                        # an empty list to store the lines
with open(logFile) as f:            # open the file
    content = f.readlines()         # read the lines

# you may also want to remove empty lines
content = [l.strip() for l in content if l.strip()]   # removing the empty lines
for line in content:
    results.append(line)    # appending each line to the list

print(results)              # printing the list


with open(logFile, "w") as f:    # open the file in write mode
    for elem in results:         # for each line stored in the results list
        f.write(str(elem) + '\n')  # write the line to the file
    print("Thank you, your data was overwritten")  # Tadaa-h!

Python 编码文本文件，打开它，替换多个部分并输出没有空行的文本格式为.csv 样式

Python encoding textfile, open it, replace multiple sections and output without empty lines as text formatted in .csv style

python

encoding

text

xls