想做一些简单的文件操作，用java太重量级，python是一个不错的选择。
有一个需求是将一个文件夹中所有的文件的内容提取出来分别填入excel的一个单元格中，
用os就可以对文件进行遍历，读文件信息
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import
os
# Get the all files & directories in the specified directory (path). def get_recursive_file_list(path):
current_files =
os.listdir(path)
all_files =
[]
for
file_name in
current_files:
full_file_name =
os.path.join(path, file_name)
all_files.append(full_file_name)
if
os.path.isdir(full_file_name):
next_level_files =
get_recursive_file_list(full_file_name)
all_files.extend(next_level_files)
return
all_files
all_files=get_recursive_file_list(‘C:\Users\green_pasture\Desktop\korea\key_words‘)
for
filename in
all_files:
print
filename
f1=open(filename,‘r+‘)
for
line1 in
f1:
print
"\n"
print
line1,
f1.close
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但是遇到一个问题，IndentationError:unindent does not match any outer indentation level，于是去查找了一下python的indentation：
http://www.secnetix.de/olli/Python/block_indentation.hawk
“关于python缩进的迷思”中说道：只有缩进层（即语句最左边）的空格是有意义的，并且跟缩进的确切数目无关，只和代码块的相对缩进有关。
同时，在你使用显式或者隐式的continue line时缩进会被忽略。
你可以把内层的代码同时写在一行，用分号隔开。如果要将他们写到不同的行，那么python会强制你使用它的indentation规则。在python中，缩进的层次和代码的逻辑结构是一致的。
不要把tab和space混在一起，通常，tab可以自动用8个空格来代替。
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import
os
# Get the all files & directories in the specified directory (path). def get_recursive_file_list(path):
current_files =
os.listdir(path)
all_files =
[]
for
file_name in
current_files:
full_file_name =
os.path.join(path, file_name)
all_files.append(full_file_name)
if
os.path.isdir(full_file_name):
next_level_files =
get_recursive_file_list(full_file_name)
all_files.extend(next_level_files)
return
all_files
all_files=get_recursive_file_list(‘C:\Users\green_pasture\Desktop\korea\key_words‘)
for
filename in
all_files:
print
filename
f1=open(filename,‘r+‘)
for
line1 in
f1: print
line1,
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我将for里面的语句跟for写在了同一行，程序没有错误了。
接着我要把打印出来的文件内容写入到excel单元格当中。
可以使用xlsxWriter https://xlsxwriter.readthedocs.org/
xlwt http://www.python-excel.org/
openpyxl http://pythonhosted.org/openpyxl/
xlsxWriter文档挺全，就考虑用这个
samplecode是：
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################################################################################ A simple example of some of the features of the XlsxWriter Python module.## Copyright 2013-2014, John McNamara, jmcnamara@cpan.org#import
xlsxwriter
# Create an new Excel file and add a worksheet.workbook =
xlsxwriter.Workbook(‘demo.xlsx‘)
worksheet =
workbook.add_worksheet()
# Widen the first column to make the text clearer.worksheet.set_column(‘A:A‘, 20)
# Add a bold format to use to highlight cells.bold =
workbook.add_format({‘bold‘: True})
# Write some simple text.worksheet.write(‘A1‘, ‘Hello‘)
# Text with formatting.worksheet.write(‘A2‘, ‘World‘, bold)
# Write some numbers, with row/column notation.worksheet.write(2, 0, 123)
worksheet.write(3, 0, 123.456)
# Insert an image.worksheet.insert_image(‘B5‘, ‘logo.png‘)
workbook.close() |
如何安装呢？可以使用pip installer，我的python目录下C:\Python33\Scripts已经有pip.exe，把当前路径设置到path环境变量，在命令行执行pip install XlsxWriter
出现了错误：
Fatal error in launcher: Unable to create process using C:\Python33\Scripts\pip.exe install XlsxWriter。
改用从github下载，
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$ git clone https://github.com/jmcnamara/XlsxWriter.git
$ cd XlsxWriter$ sudo python setup.py install |
创建了一个测试程序：
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import
xlsxwriter
workbook =
xlsxwriter.Workbook(‘hello.xlsx‘)
worksheet =
workbook.add_worksheet()
worksheet.write(‘A1‘, ‘Hello world‘)
workbook.close() |
测试成功。
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import
os
import
xlsxwriter
# Get the all files & directories in the specified directory (path). def get_recursive_file_list(path):
current_files =
os.listdir(path)
all_files =
[]
for
file_name in
current_files:
full_file_name =
os.path.join(path, file_name)
all_files.append(full_file_name)
if
os.path.isdir(full_file_name):
next_level_files =
get_recursive_file_list(full_file_name)
all_files.extend(next_level_files)
return
all_files
workbook =
xlsxwriter.Workbook(‘keywords.xlsx‘)
worksheet =
workbook.add_worksheet()
all_files=get_recursive_file_list(‘C:\Users\green_pasture\Desktop\korea\key_words‘)
row=0
for
filename in
all_files:
print
filename
f1=open(filename,‘r+‘)
keywords=""
list=[]
a="\n"
for
line in
f1: list.append(line),
keywords=a.join(list)
print
keywords
worksheet.write(row,0, filename)
worksheet.write(row,1,keywords.decode("utf-8"))
row=row+1
workbook.close() |