Python - list comprehension

# oryginal: https://pastebin.com/krRhJNQm

def func(years, fields):
    print [ (year.year, field) for year, field in zip(years, fields) ]

def func(years, fields):
    print list(map(lambda d: (d[0].year, d[1]), zip(years, fields)))

# --- script for test ---

#!/usr/bin/env python3

def func0(years, fields):
    result = []
    for i, y in enumerate(years):
        tup = (y, fields[i])
        result.append(tup)
    #print(result)

def func0zip(years, fields):
    result = []
    for y, f in zip(years, fields):
        result.append((y, f))
    #print(result)

def func1(years, fields):
    result = [(y.year, f) for (y, f) in zip(years, fields)]
    #print(result)

def func2(years, fields):
    result = list(map(lambda d: (d[0].year, d[1]), zip(years, fields)))
    #print(result)

# --- test ---

import random
import datetime
import string

# random data
size = 10009
fields = [ random.choice(string.ascii_letters) for x in range(size) ]
dates = [ datetime.datetime(random.randint(1900, 2018), 1, 1) for x in range(size) ]

#print(fields)
#print(dates)
#print()

start = datetime.datetime.now()
func0(dates, fields)
end = datetime.datetime.now()
print('time:', end-start)

start = datetime.datetime.now()
func0zip(dates, fields)
end = datetime.datetime.now()
print('time:', end-start)

start = datetime.datetime.now()
func1(dates, fields)
end = datetime.datetime.now()
print('time:', end-start)

start = datetime.datetime.now()
func2(dates, fields)
end = datetime.datetime.now()
print('time:', end-start)