import sys
log_file = sys.argv[1]
s = open(log_file, encoding='utf8').read()
start = s.find('best lambda')
start = start + 13
end = s[start:].find(' ')
end += start
print(s[start:end])

ec5f0d77eb7c7aafebd4366fb8c0463fd778f5d2
<mask token>

<mask token>
end += start
print(s[start:end])

<mask token>
log_file = sys.argv[1]
s = open(log_file, encoding='utf8').read()
start = s.find('best lambda')
start = start + 13
end = s[start:].find(' ')
end += start
print(s[start:end])

import sys
log_file = sys.argv[1]
s = open(log_file, encoding='utf8').read()
start = s.find('best lambda')
start = start + 13
end = s[start:].find(' ')
end += start
print(s[start:end])
