标签：deposit ESS 名称 指令 ems job input 小练习 新建
目录操作
习题1:读一个文件，包含英文句子，请统计共多少个不重复的单词，#并且在另外一个文件中打印每个单词以及它的出线次数
#encoding =utf-8
import string
words = ""
words_dict ={}
with open("e:\\python\\a.txt") as file_obj:
for line in file_obj:
for v in line:
if not v.isalpha():
line = line.replace(v," ")
words += line
word_list = words.split()
print("不重复的单词个数:",len(set(word_list)))
for word in word_list:
if words_dict.get(word) is None:
words_dict[word] =1
else:
words_dict[word] += 1
with open("e:\\python\\101401.txt","w") as file_obj:
for k,v in words_dict.items():
file_obj.write("%s出现%d次\n" %(str(k),v))
习题2：写个记账程序，每天收入多少，支出多少，总额剩多少，使用序列化方式保存信息
import pickle
fp = open("e:\\a.txt","rb")
try:
income=pickle.load(fp)
spend=pickle.load(fp)
deposit=pickle.load(fp)
except:
income = []
spend = []
deposit= 0
fp.close()
#value|specification
while 1:
content=input("请输入指令：")
if content.find("exit")!=-1:
break
if content.find("|")==-1:
print("data?format?is?value|specification")
print("please?input?again!")
continue
value = content.split("|")[0]
try:
value=float(value)
except:
print("data?format?is?value|specification")
print("data?format?is?value?must?be?a?number")
if value>0:
income.append(content)
deposit+=value
elif value==0:
print("空间有限，不存0")
else:
spend.append(content[1:])
deposit+=value
print(income)
print(spend)
print(deposit)
fp=open("e:\\a.txt","wb")
pickle.dump(income,fp)
pickle.dump(spend,fp)
pickle.dump(deposit,fp)
fp.close()
方式2:
#encoding=utf-8
import pickle
income = []
spend = []
deposit = 0.0
while 1:
command = input("请输入收入、支出和金额，如: 支出>50,输入q退出: ")
if command.lower() == "q":
break
try:
amount = float(command.split(">")[1])
except Exception as e:
print("输入错误，请重新输入")
continue
else:
type = command.split(">")[0]
if type == "收入":
income.append(amount)
deposit += amount
elif type == "支出":
if deposit - abs(amount) >= 0:
spend.append(abs(amount))
deposit -= amount
else:
print("余额不足！")
print("收入:",income)
print("支出:",spend)
print("余额:",deposit)
file_obj = open("e:\\in_out.txt","wb")
pickle.dump(income,file_obj)
pickle.dump(spend,file_obj)
pickle.dump(spend,file_obj)
file_obj.close()
习题3：数据分析需求：每行内容需要生成以每行首年月日为名称的文件，文件内容写入|0|后的所有行内容（也包括|0| ）
20160215000148|0|collect info job start|success|
20160215000153|0|collect info jobend|success|resultcode = 0000
20160216000120|0|collect info job start|success|
20160216000121|0|collect info jobend|success|resultcode = 0000
20160217000139|0|collect info job start|success|
20160217000143|0|collect info jobend|success|resultcode = 0000
#encoding =utf-8
with open("e:\\python\\a.txt") as file_obj:
for line in file_obj:
with open(line[:14] + ".txt","w") as fp:
fp.write(line[14:])
习题4：删除目录下所有的.txt文件
#encoding =utf-8
import os
os.chdir("e:\\python1")
for file in os.listdir():
if ".txt" in file:
os.remove(file)
习题5:在当前目录下，找到1小时内新建的所有文件。
算法：
取出某个目录内，1小时内新建的所有文件名。
算法：遍历这个目录，取到所有的文件每个文件用stat取到创建时间用创建时间和当前时间去比对，是否小于3600放到一个列表里面
#encoding =utf-8
import os
import time
os.chdir("e:\\python")
result = []
for file in os.listdir():
if os.path.isfile(file):
c_time = os.stat(file).st_ctime
if time.time() - c_time < 3600:
result.append(file)
print(result)
习题6:小练习，把所有的txt文件干掉。新建一个空的子目录xxx，放在某个层级下，,把它删掉
方式1:
#encoding =utf-8
import os
dirs = 0
files = 0
for root,dirs,files in os.walk("e:\\testdemo"):
os.chdir(root)
for dir in dirs:
if dir =="xxx":
os.rmdir(dir)
for file in files:
if ".txt" in file:
os.remove(file)
方式2：
#encoding=utf-8
import os
import os.path
dir_count=0
file_count=0
for root, dirs, files in os.walk("e:\\testdemo",topdown=True) :
print(u"当前目录:",root) #打印目录绝对路径
for name in files :
print(u‘文件名：‘,os.path.join(root,name) )#打印文件绝对路径
if name[-4:]==".txt":
os.remove(os.path.join(root,name))
file_count+=1
for name in dirs :
print(u‘目录名：‘,name) #打印目录绝对路径
if name =="xxx":
os.rmdir(os.path.join(root,name))
dir_count+=1
print ("目录个数%s" %dir_count)
print ("文件个数%s" %file_count)
习题7:统计一个文件夹下所有文件类型
#encoding =utf-8
import os
result = []
for root,dirs,files in os.walk("e:\\python\\python2"):
os.chdir(root)
for file in files:
post_name = os.path.splitext(file)[1]
if post_name != "":
result.append(post_name)
print(list(set(result)))
print(len(list(set(result)))) 标签：deposit ESS 名称 指令 ems job input 小练习 新建
原文地址：http://blog.51cto.com/13496943/2313135
