下面的命令，是你應該記住的命令：
close – 關閉檔案。跟你編輯器的 檔案->儲存… 乙個意思。
read – 讀取檔案內容。你可以把結果賦給乙個變數。
readline – 讀取文字檔案中的一行。
truncate – 清空檔案，請謹慎使用該命令。
write(『stuff』) – 將stuff寫入文
書中**：
from sys import ar**
script, filename = ar**
print "we're going to erase %r." % filename
print "if you don't want that, hit ctrl-c (^c)."
print "if you do want that, hit return."
raw_input("?")
print "opening the file..."
target = open(filename, 'w')
print "truncating the file. goodbye!"
target.truncate()
print "now i'm going to ask you for three lines."
line1 = raw_input("line 1: ")
line2 = raw_input("line 2: ")
line3 = raw_input("line 3: ")
print "i'm going to write these to the file."
target.write(line1)
target.write("\n")
target.write(line2)
target.write("\n")
target.write(line3)
target.write("\n")
print "and finally, we close it."
target.close()
from sys import ar**
script, filename = ar**
print("we're going to erase % r. " % filename)
print("if you don't want that, hit ctrl-c(^c).")
print("if you do want that, hit return.")
input("?")
print("opening the file...")
target = open(filename, 'w')
print("truncating the file. goodbye!")
target.truncate()
print("now i'm going to ask you for three lines.")
line1 = input("line 1:")
line2 = input("line 2:")
line3 = input("line 3:")
print("i'm going to write these to the file.")
target.write(line1)
target.write("\n")
target.write(line2)
target.write("\n")
target.write(line3)
target.write("\n")
print("and finally, we close it.")
target.close()
開啟text.txt檔案檢查檔案中的內容
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