s = 'asdf1234'
tmp = ''
for i in s:
    if i.isdigit(): tmp += i
print int(tmp)

деньги за 2016 год: 134

 with open('test.txt') as f:
    for l in f.readlines()[::3]:
        print f.split(':')[-1].strip()

 import re
with open('name.txt') as file:
    lis_t = [ i.strip() for i in file.readlines() ]
res = ''.join(re.findall(r'\d',lis_t [1]))
print (res)

 import re
a="asd123"
b=int(re.findall(r"\d+",a)[0])

Виктор 1
Деньги: 2600

Виктор 2
Деньги: 2500

  
>>> with open('file.txt', encoding='utf-8') as fin:
...     for line in fin:
...         if line.startswith('Деньги:'):
...             money = int(line.split()[1])
...             break
... 
>>> print(money)
2600
>>>