Python oct()用法及代码示例

# Python3 program to demonstrate 
# the use of oct() function 
  
print("The octal representation of 23 is " + oct(23)) 
  
print("The octal representation of the"
    " ascii value of 'z' is " + oct(ord('z'))) 
  
# Binary representation of a number 
# can be passed as parameter 
  
# For 23, Binary is 0b10111 
print("The octal representation of the binary"
                " of 23 is " + oct(0b10111)) 
  
# For 23, Hexadecimal is 0x17 
print("The octal representation of the binary"
                " of 23 is " + oct(0x17))

# Python3 program demonstrating TypeError 
  
print("The Octal representation of 29.5 is " + oct(29.5)) 
  
''' 
# Python doesn't have anything like float.oct() 
# to directly convert a floating type constant 
# to it's octal representation. Conversion of a 
# floating point value to it's octal is done manually. 
'''

# TypeConversions from decimal and binary 
# to their respective octal representations 
  
# The choices present to the user 
print("a. Hexadecimal to Octal ") 
print("b. Decimal to Octal") 
print("c. Binary to Octal") 
  
# Function generates octal representation  
# from it's binary from 
def bin_to_oct():
      
    print("Enter your input in BIN format:-") 
      
    # taking user input as binary string and  
    # then using int() to convert it into it's 
    # respective decimal format 
    x = int(input(), 2) 
    print("Octal form of " + str(x) + " is " + oct(x) ) 
  
  
# Function generates octal representation 
#  of it's hexadecimal form passed as value. 
def hex_to_oct():
    print("Enter your input in HEX format:-") 
  
    # taking user input as hexadecimal string and  
    # then using int() to convert it into it's 
    # respective decimal format 
    x = int(input(), 16) 
    print("Octal form of " + str(x) + " is " + oct(x)) 
  
  
# Function converts decimal form to it's  
# respective octal representation 
def decimal_to_oct():
  
    print("Enter a number with base-10 format:-") 
  
    # taking a simple user input and  
    # converting it to an integer 
    x = int(input()) 
    print("Octal form of " + str(x) + " is " + oct(x)) 
  
  
# Driver Code 
ch = input("Enter your choice:-\n") 
  
if ch is 'a':
    hex_to_oct() 
elif ch is 'b':
    decimal_to_oct() 
elif ch is 'c':
    bin_to_oct()