Python chr()用法及代碼示例

chr()方法返回一個字符串，該字符串表示Unicode代碼點是整數的字符。句法：

chr(num)
num: integer value

• chr()方法僅使用一個整數作為參數。
• 範圍可能從0到1,1141,111(以16為底的0x10FFFF)變化。
• chr()方法返回一個字符，其Unicode點為num(整數)。
• 如果傳遞的整數超出範圍，則該方法返回ValueError。

示例：假設我們要打印“ G e e k s f o r G e e k s”。

# Python program to illustrate  
# chr() builtin function 
  
print(chr(71), chr(101), 
chr(101), chr(107), 
chr(115), chr(32), 
chr(102), chr(111), 
chr(114),chr(32), 
chr(71), chr(101), 
chr(101), chr(107),  
chr(115))

輸出：

G e e k s   f o r   G e e k s

另一個例子：

# Python program to illustrate  
# chr() builtin function 
  
numbers = [17, 38, 79] 
  
for number in numbers:
      
    # Convert ASCII-based number to character. 
    letter = chr(number) 
    print("Character of ASCII value", number, "is ", letter)

輸出：

Character of ASCII value 17 is  
Character of ASCII value 38 is  &
Character of ASCII value 79 is  O

如果我們超出範圍，會發生什麽？

# Python program to illustrate  
# chr() builtin function 
# if value given is  
# out of range 
  
# Convert ASCII-based number to character 
print(chr(400))

輸出：

No Output

我們不會得到任何輸出，編譯器將拋出錯誤：

Traceback (most recent call last):
  File "/home/484c76fb455a624cc137946a244a9aa5.py", line 1, in 
    print(chr(400))
UnicodeEncodeError:'ascii' codec can't encode character 
'\u0190' in position 0:ordinal not in range(128)