我正在尝试将一个文本字符串编码为base64。
我尝试过这样做:
name = "your name"
print('encoding %s in base64 yields = %s\n'%(name,name.encode('base64','strict')))
但是这会导致以下错误：
LookupError: 'base64' is not a text encoding; use codecs.encode() to handle arbitrary codecs
我该如何做到这一点？（使用Python 3.4）
记得导入base64模块，同时b64encode需要以bytes类型作为参数。
import base64
b = base64.b64encode(bytes('your string', 'utf-8')) # bytes
base64_str = b.decode('utf-8') # convert bytes to string
b'home'.decode('ascii') 进行解码。 - mgilson要在py3中进行base64编码和解码，请使用以下代码：
import base64
def b64e(s):
return base64.b64encode(s.encode()).decode()
def b64d(s):
return base64.b64decode(s).decode()
base64模块不能自动将其转换回字符串... - S.B.b64decode 函数需要一个字符串而不是字节？这些函数为什么不对称呢？ - Pynchiareturn base64.b64encode(s.encode('utf-8')).decode('utf-8')。 - undefined结果证明这非常重要，以至于需要一个独立的模块...
import base64
base64.b64encode(b'your name') # b'eW91ciBuYW1l'
base64.b64encode('your name'.encode('ascii')) # b'eW91ciBuYW1l'
- sukhvirbase64.b64encode(b'%s'%name) SyntaxError: multiple statements found while compiling a single statement`
在Python 2中，以下代码可以不使用任何导入库就能正常运行：
>>>
>>> 'Some text'.encode('base64')
'U29tZSB0ZXh0\n'
>>>
>>> 'U29tZSB0ZXh0\n'.decode('base64')
'Some text'
>>>
>>> 'U29tZSB0ZXh0'.decode('base64')
'Some text'
>>>
（尽管这在Python3中不起作用）
2）在Python 3中，您需要导入base64并执行base64.b64decode（'...'）- 这也适用于Python 2。
\n。
>>> 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'.encode('base64') 'eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4\neHh4\n' - Henrik Nordvikimport base64
conv_bytes = bytes('your string', 'utf-8')
print(conv_bytes) # b'your string'
encoded_str = base64.b64encode(conv_bytes)
print(encoded_str) # b'eW91ciBzdHJpbmc='
print(base64.b64decode(encoded_str)) # b'your string'
print(base64.b64decode(encoded_str).decode()) # your string
import six
import base64
def b64encode(source):
if six.PY3:
source = source.encode('utf-8')
content = base64.b64encode(source).decode('utf-8')
base64模块，但你也可以使用codecs模块（在你的错误信息中提到）来进行二进制编码（意味着非标准和非文本编码）。import codecs
my_bytes = b"Hello World!"
codecs.encode(my_bytes, "base64")
codecs.encode(my_bytes, "hex")
codecs.encode(my_bytes, "zip")
codecs.encode(my_bytes, "bz2")
这对于大量数据非常有用，因为您可以将它们链接在一起以获得压缩和json序列化的值：
最初的回答
my_large_bytes = my_bytes * 10000
codecs.decode(
codecs.encode(
codecs.encode(
my_large_bytes,
"zip"
),
"base64"),
"utf8"
)
Refs:
import base64
#Taking input through the terminal.
welcomeInput= raw_input("Enter 1 to convert String to Base64, 2 to convert Base64 to String: ")
if(int(welcomeInput)==1 or int(welcomeInput)==2):
#Code to Convert String to Base 64.
if int(welcomeInput)==1:
inputString= raw_input("Enter the String to be converted to Base64:")
base64Value = base64.b64encode(inputString.encode())
print "Base64 Value = " + base64Value
#Code to Convert Base 64 to String.
elif int(welcomeInput)==2:
inputString= raw_input("Enter the Base64 value to be converted to String:")
stringValue = base64.b64decode(inputString).decode('utf-8')
print "Base64 Value = " + stringValue
else:
print "Please enter a valid value."
请点击link了解更多关于理解和使用base64编码的详细信息。
对于那些想要从头开始实现base64编码以便理解的人，这里提供了将字符串编码为base64的代码。
#!/usr/bin/env python3.10
class Base64Encoder:
#base64Encoding maps integer to the encoded text since its a list here the index act as the key
base64Encoding:list = None
#data must be type of str or bytes
def encode(data)->str:
#data = data.encode("UTF-8")
if not isinstance(data, str) and not isinstance(data, bytes):
raise AttributeError(f"Expected {type('')} or {type(b'')} but found {type(data)}")
if isinstance(data, str):
data = data.encode("ascii")
if Base64Encoder.base64Encoding == None:
#construction base64Encoding
Base64Encoder.base64Encoding = list()
#mapping A-Z
for key in range(0, 26):
Base64Encoder.base64Encoding.append(chr(key + 65))
#mapping a-z
for key in range(0, 26):
Base64Encoder.base64Encoding.append(chr(key + 97))
#mapping 0-9
for key in range(0, 10):
Base64Encoder.base64Encoding.append(chr(key + 48))
#mapping +
Base64Encoder.base64Encoding.append('+')
#mapping /
Base64Encoder.base64Encoding.append('/')
if len(data) == 0:
return ""
length=len(data)
bytes_to_append = -(length%3)+(3 if length%3 != 0 else 0)
#print(f"{bytes_to_append=}")
binary_list = []
for s in data:
ascii_value = s
binary = f"{ascii_value:08b}"
#binary = bin(ascii_value)[2:]
#print(s, binary, type(binary))
for bit in binary:
binary_list.append(bit)
length=len(binary_list)
bits_to_append = -(length%6) + (6 if length%6 != 0 else 0)
binary_list.extend([0]*bits_to_append)
#print(f"{binary_list=}")
base64 = []
value = 0
for index, bit in enumerate(reversed(binary_list)):
#print (f"{bit=}")
#converting block of 6 bits to integer value
value += ( 2**(index%6) if bit=='1' else 0)
#print(f"{value=}")
#print(bit, end = '')
if (index+1)%6 == 0:
base64.append(Base64Encoder.base64Encoding[value])
#print(' ', end="")
#resetting value
value = 0
pass
#print()
#padding if there is less bytes and returning the result
return ''.join(reversed(base64))+''.join(['=']*bytes_to_append)
#!/usr/bin/env python3.10
from encoder import Base64Encoder
if __name__ == "__main__":
print(Base64Encoder.encode("Hello"))
print(Base64Encoder.encode("1 2 10 13 -7"))
print(Base64Encoder.encode("A"))
with open("image.jpg", "rb") as file_data:
print(Base64Encoder.encode(file_data.read()))
$ ./testEncoder.py
SGVsbG8=
MSAyIDEwIDEzIC03
QQ==