print("->文件句柄的獲取，讀操作:")
 
 f = open('無題','r',encoding='utf8')
 d = f.read()
 f.close()
 print(d)
 
 print('->例二：')
 f = open('無題','r',encoding='utf8')
 e = f.read(9)
 f.close()
 print(e)
 #python3中，文件中一個中英文都占位1

->文件句柄的獲取，讀操作:
昨夜星辰昨夜風(fēng)
畫樓西畔桂堂東
身無彩鳳雙飛翼
心有靈犀一點(diǎn)通
->例二：
昨夜星辰昨夜風(fēng)
畫

print("寫的操作，寫文件的時(shí)候，不能調(diào)用讀方法，讀文件的時(shí)候，不能調(diào)用寫方法")
 
f = open('python','w',encoding='utf8')
f.write("I must learn python \nbecause, python is important \n")
f.write("java is better?")
f.write("maybe") #上面的語句，沒有加換行符，所以輸出的內(nèi)容是緊接的
f.close()

I must learn python 
because, python is important 
java is better?maybe

f = open('python','a',encoding='utf8')
f.write("花開又花落")
f.close()

I must learn python 
because, python is important 
java is better?maybe花開又花落
 

 print("readline方法")
 f = open('無題','r',encoding='utf8')
 a = f.readline()
 print("此時(shí)光標(biāo)位置：",f.tell())
 b = f.readline()
 print("此時(shí)光標(biāo)位置：",f.tell())
 print(a.strip()) #strip是字符串方法中去除空格和換行的方法
 print(b.strip())
 
 
 print("readlines方法，會將每行的內(nèi)容組成一個列表打印")
 f = open('無題','r',encoding='utf8')
 c = f.readlines()
 print(c)
 print(id(c))
 print(id(f))
 for i in c:
  print(i.strip())
 print("遍歷方法")
 f.seek(0)
 for i in f:
  print(i.strip())
 f.close() #文件的操作中，close()方法一定不能忘記

readline方法
此時(shí)光標(biāo)位置： 23
此時(shí)光標(biāo)位置： 46
昨夜星辰昨夜風(fēng)
畫樓西畔桂堂東
readlines方法，會將每行的內(nèi)容組成一個列表打印
['昨夜星辰昨夜風(fēng)\n', '畫樓西畔桂堂東\n', '身無彩鳳雙飛翼\n', '心有靈犀一點(diǎn)通']
37826824
5344280
昨夜星辰昨夜風(fēng)
畫樓西畔桂堂東
身無彩鳳雙飛翼
心有靈犀一點(diǎn)通
遍歷方法
昨夜星辰昨夜風(fēng)
畫樓西畔桂堂東
身無彩鳳雙飛翼
心有靈犀一點(diǎn)通

f = open('無題','r',encoding='utf8')
f.read(4)
print('當(dāng)前光標(biāo)位置',f.tell())

f.seek(10)
print('當(dāng)前光標(biāo)位置',f.tell())
f.close()

#read時(shí)，一個中文算三個字符

import sys,time

for i in range(20):
 sys.stdout.write("#")
 sys.stdout.flush()
 time.sleep(1)

f = open('test','w')
f.write("hello")
f.write("\n")
f.write("python")
f.flush() #這樣不用執(zhí)行close方法，內(nèi)存中的數(shù)據(jù)，就會寫入到disk
f.close()

f = open('test','a')
f.truncate(2) #截?cái)喾椒?光標(biāo)從2開始往后截取
f.close()

fileHandle = open ( 'test.txt', 'a' ) 
fileHandle.write ( '\n\nBottom line.' ) 
fileHandle.close()

fileHandle = open ( 'test.txt' ) 
print fileHandle.read() 
fileHandle.close()

fileHandle = open ( 'test.txt' ) 
print fileHandle.readline() # "This is a test." 
fileHandle.close() 

fileHandle = open ( 'test.txt' ) 
fileList = fileHandle.readlines() 
for fileLine in fileList: 
print '>>', fileLine 
fileHandle.close() 

fileHandle = open ( 'test.txt' ) 
print fileHandle.read ( 1 ) # "T" 
fileHandle.seek ( 4 ) 
print FileHandle.read ( 1 ) # " "(原文有錯)