Python: Convert hex to string

Question

A value like 0x0F or 0x05 has to be given to a function as a string without the 0x at the beginning so 0F or 05.

If I use str(hex(0x0F))[2:4] I only get f. It is crucial that the missing 0 is still present in my application.

How can i do that?

vaultah · Accepted Answer · 2015-04-29 15:37:09Z

3

You'd use str.format:

In [1]: '{:02X}'.format(0x0F)
Out[1]: '0F'

In this context {:02X} is equivalent to {0:02X}. Preceding the colon with 0 tells Python to apply this to the first argument of str.format (0x0F in this example). 02 sets the minimum field width to 2 and

Preceding the width field by a zero ('0') character enables sign-aware zero-padding for numeric types

X is one of the available integer presentation types:

Hex format. Outputs the number in base 16, using upper- case letters for the digits above 9.

Both quotes are from Format Specification Mini-Language.

edited Apr 29, 2015 at 15:37

answered Apr 29, 2015 at 14:41

vaultah

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3 Comments

Kreatronik Over a year ago

What means In[14] and Out[14]?

vaultah Over a year ago

@Creatronik this is what IPython shell adds. You can safely ignore it.

Kreatronik Over a year ago

Ok, this works fine, but can you give me a link, where this whole {:02X} statement is explained more in detail? Or maybe do it yourself right away :D

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