Add "b" prefix to python variable?
Question:
Adding the prefix “b” to a string converts it to bytes:
b'example'
But I can’t figure out how to do this with a variable. Assuming string = 'example', none of these seem to work:
b(string)
b string
b'' + string
Is there a simple way to do this?
Answers:
Use bytes():
>>> bytes("hello", encoding="ascii")
b'hello'
# only an example, you can choose a different encoding
bytes('example', encoding='utf-8')
In Python3:
Bytes literals are always prefixed with ‘b’ or ‘B’; they produce an
instance of the bytes type instead of the str type. They may only
contain ASCII characters; bytes with a numeric value of 128 or greater
must be expressed with escapes.
In Python2:
A prefix of ‘b’ or ‘B’ is ignored in Python 2; it indicates that the
literal should become a bytes literal in Python 3.
More about bytes():
bytes([source[, encoding[, errors]]])
Return a new “bytes” object, which is an immutable sequence of
integers in the range 0 <= x < 256. bytes is an immutable version of
bytearray – it has the same non-mutating methods and the same indexing
and slicing behavior.
Accordingly, constructor arguments are interpreted as for bytearray().
Bytes objects can also be created with literals, see String and Bytes
literals.
string = bytes(string, encoding= 'utf-8')
where ‘string’ is your variable.
Or use the bytes.decode() method to convert to string (using a given encoding):
>>> b'hello'.decode('utf-8')
'hello'
The opposite conversion is str.encode() to convert a string to bytes:
>>> 'hello'.encode('utf-8')
b'hello'
I have checked for this for long time and i think the best way to convert a string into a varible is using vars()
vars()[‘variable name’] = value to assign
vars()['created_variable'] = 1
print(created_variable)
>> 1
Adding the prefix “b” to a string converts it to bytes:
b'example'
But I can’t figure out how to do this with a variable. Assuming string = 'example', none of these seem to work:
b(string)
b string
b'' + string
Is there a simple way to do this?
Use bytes():
>>> bytes("hello", encoding="ascii")
b'hello'
# only an example, you can choose a different encoding
bytes('example', encoding='utf-8')
In Python3:
Bytes literals are always prefixed with ‘b’ or ‘B’; they produce an
instance of the bytes type instead of the str type. They may only
contain ASCII characters; bytes with a numeric value of 128 or greater
must be expressed with escapes.
In Python2:
A prefix of ‘b’ or ‘B’ is ignored in Python 2; it indicates that the
literal should become a bytes literal in Python 3.
More about bytes():
bytes([source[, encoding[, errors]]])
Return a new “bytes” object, which is an immutable sequence of
integers in the range 0 <= x < 256. bytes is an immutable version of
bytearray – it has the same non-mutating methods and the same indexing
and slicing behavior.Accordingly, constructor arguments are interpreted as for bytearray().
Bytes objects can also be created with literals, see String and Bytes
literals.
string = bytes(string, encoding= 'utf-8')
where ‘string’ is your variable.
Or use the bytes.decode() method to convert to string (using a given encoding):
>>> b'hello'.decode('utf-8')
'hello'
The opposite conversion is str.encode() to convert a string to bytes:
>>> 'hello'.encode('utf-8')
b'hello'
I have checked for this for long time and i think the best way to convert a string into a varible is using vars()
vars()[‘variable name’] = value to assign
vars()['created_variable'] = 1
print(created_variable)
>> 1