How can I get Python to use upper case letters when printing hexadecimal values?

Question

In Python v2.6 I can get hexadecimal for my integers in one of two ways:

print(("0x%x")%value)
print(hex(value))

However, in both cases, the hexadecimal digits are lower case. How can I get these in upper case?

Answer 1

Capital X (Python 2 and 3 using sprintf-style formatting):

print("0x%X" % value)

Or in python 3+ (using .format string syntax):

print("0x{:X}".format(value))

Or in python 3.6+ (using formatted string literals):

print(f"0x{value:X}")

Answer 2

Just use upper().

intNum = 1234
hexNum = hex(intNum).upper()
print('Upper hexadecimal number = ', hexNum)

Output:

Upper hexadecimal number =  0X4D2

Answer 3

By using uppercase %X:

>>> print("%X" % 255)
FF

Updating for Python 3.6 era: Just use 'X' in the format part, inside f-strings:

print(f"{255:X}")

(f-strings accept any valid Python expression before the : - including direct numeric expressions and variable names).

Answer 4

print(hex(value).upper().replace('X', 'x'))

Handles negative numbers correctly.