包含python怎么读取文件夹里部分的文件的词条
python 怎么读取当前目录下指定文件
读文本文件
input = open('data', 'r')
#第二个参数默认为r
input = open('data')
读二进制文件
input = open('data', 'rb')
读取所有内容
file_object = open('thefile.txt')
try:
all_the_text = file_object.read( )
finally:
file_object.close( )
读固定字节
file_object = open('abinfile', 'rb')
try:
while True:
chunk = file_object.read(100)
if not chunk:
break
do_something_with(chunk)
finally:
file_object.close( )
读每行
list_of_all_the_lines = file_object.readlines( )
如果文件是文本文件，还可以直接遍历文件对象获取每行：
for line in file_object:
process line
怎么用python读取txt文件里指定行的内容，并导入excel？
全文使用的是xlswriter模块写的，也有人使用?xlrd与?xlutils模块实现，不过还未进行验证
import xlsxwriter
workbook = xlsxwriter.Workbook("D:\\Program Files\\subpy\\sql2.xlsx")#在指定目录下创建一个excle
worksheet = workbook.add_worksheet("students")#新建一个sheet
title_index = ["A","B","C","D"]#sheet中的区域
li = [] #定义一个空列表
blod = workbook.add_format({"bold":True})#定义exlce中写入的字体with open("D:\\Program Files\\subpy\\tets.txt",'r') as f1:#打开txt文档
lines = f1.readlines()#读取所有行内容
n = -1#定义一个变量
for x in lines:#逐行读取
n=n+1
li.append(x[:-1]）#去掉回车符
y= x.split#以空格分字符
for i in range(len(title_index)):#读取excle区域下标
# for i,j in enumerate(title_index)：
content = y[i]#单个字符读取
worksheet.write(n,i,content,blod)#分行分列写入workbook.
close#关闭excle
txt文件可以用行号，用readlines读取出来的数据是一个列表，你可以使用：
f = open('', 'r')
line = f.readlines()
line_need = line[行号-1]
这样来取指定行
请问大神怎样用python批量读取文件夹下的文件？
import?os
def?search(s,?path=os.path.abspath('.')):
????for?z?in?os.listdir(path):
????????if?os.path.isdir(path?+?os.path.sep?+?z):
????????????print('Currnet:',?path)
????????????path2?=?os.path.join(path,?z)
????????????print('future:',?path2)
????????????search(s,?path2)
????????elif?os.path.isfile(path?+?os.path.sep?+?z):
????????????if?s?in?z:
????????????????print(os.path.join(path,?z))
????????????????with?open(path?+?os.path.sep?+?z,?'r')?as?fr:
????????????????????with?open('save.txt',?'a')?as?fw:
????????????????????????fw.write(path?+?'\t'?+?fr.read())
search('csv',?'.')
批量阅读文件夹里的文件 python
#!/usr/bin/env?python3.6
from?pathlib?import?Path
def?read_all_txt(dirname):
????ss?=?[]
????for?p?in?Path(dirname).rglob('*.txt'):
????????ss.append(p.read_text())
????return?ss
python 随机读取文件夹内一个文本文件
来个批量读取文件的例子：
def?read_test_data():
????for?parent,dirnames,filenames?in?os.walk(pbx_test_path):
????????for?filename?in?filenames:
????????????if?filename[:5]?==?"TEST_":
????????????????file_path?=?pbx_test_path+"\%s"?%?filename
????????????????#file_bak_path?=?pbx_test_path_bak+"\%s"?%?filename
????????????????if?os.path.isfile(file_path):
????????????????????#print?file_path
????????????????????read_by_file(file_path)
????????????????????#shutil.copyfile(file_path,file_bak_path)
????????????????????try:
????????????????????????os.remove(file_path)
????????????????????except??WindowsError:
????????????????????????pass
?????????????????
def?read_by_file(file_path):
????file_object?=?open(file_path)
????count?=?0
????thefile?=?open(file_path,?'rb')
????while?True:
????????buffer?=?str(thefile.readline())
????????if?not?buffer:
????????????break
????????all_test_list?=?buffer.split(";")
????????all_test_list?=?all_test_list[:len(all_test_list)-1]#去除回车行
????????ziduan_str?=?""
????????value_str?=?""
????????for?i,test?in?enumerate(all_test_list):
????????????test_attr_list?=?test.split("=")
????????????ziduan_str?+=?""+test_attr_list[0]+","
????????????value_str?+=?"'"+test_attr_list[1]+"',"
????????ziduan_str?=?"("+ziduan_str[:len(ziduan_str)-1]+")"
????????value_str?=?"("+value_str[:len(value_str)-1]+")"
????????sql_str?=?"insert?into?pbx_test"+ziduan_str+"?values"+value_str+""
????????#mssql.insert(sql_str)
????????session.execute(sql_str)
????????count?+=?buffer.count('\n')
????commit()
????thefile.close()
用Python读取指定txt文件中的部分内容
程序代码如下：
import?os
mxdPath=r"F:\res\高程点.txt"
fpa=open(mxdPath)
fp-1=open("1.txt","w")
fp-2=open("2.txt","w")
for?linea?in?fpa.readlines():
????linea=linea.replace("\n","").split("\t")
????fp-1.writeline(linea[0])
????fp-2.writeline(linea[1])
fpa.close()
fp-1.close()
fp-2.close()
首先打开数据存放的文件进行，读操作；
然后打开两个写文件，如果不存在，可以直接创建；
按行读取，然后分割，分别写入不同的文件。