在 Python 中重新格式化字符串

Question

I am looking for some help on the following reformatting problem.

I have 3 random characters that appear joined in my data set. I need to separate the first character with a space from the other two, then insert a '/' between remaining two. ie

random_char = '713' expected_result = '7 1/3'

Answer 1

Assuming your string is always exactly three characters, here is one solution:

random_char = '713'
result = '{} {}/{}'.format(*random_char)

print(result)
>>> '7 1/3'

The {} are placeholders, and the *random_char 'unpacks' the characters of your original string into the three placeholders.

Answer 2

random_char = '713'

# using unary '*' as the unpack operator
print('{} {}/{}'.format(*random_char))

# is here equivalent to
print('{} {}/{}'.format(random_char[0], random_char[1], random_char[2]))

Answer 3

You can simply separate string into characters and form as you want to use them. in your case it can be formed as:

a = '732'
print(a[0] + ' ' + a[1] + '/' + a[2])

output will be 7 3/2