filter function in python

1ages = [5, 12, 17, 18, 24, 32]
2def myFunc(x):
3  if x < 18:
4    return False
5  else:
6    return True
7  
8adults = filter(myFunc, ages)
9for x in adults:
10  print(x)     		# 18 24 32

1nums1 = [2,3,5,6,76,4,3,2]
2
3def bada(num):
4    return num>4 # bada(2) o/p: False, so wont return.. else anything above > value returns true hence filter function shows result  
5
6filters = list(filter(bada, nums1))
7print(filters)
8 
9(or) 
10 
11bads = list(filter(lambda x: x>4, nums1))
12print(bads)
13

1# filter is just filters things
2
3my_list = [1, 2, 3, 4, 5, 6, 7]
4
5
6def only_odd(item):
7    return item % 2 == 1	# checks if it is odd or even
8
9
10print(list(filter(only_odd, my_list)))
11

1>>> numbers = [-2, -1, 0, 1, 2]
2
3>>> # Using a lambda function
4>>> positive_numbers = filter(lambda n: n > 0, numbers)
5>>> positive_numbers
6<filter object at 0x7f3632683610>
7>>> list(positive_numbers)
8[1, 2]
9
10>>> # Using a user-defined function
11>>> def is_positive(n):
12...     return n > 0
13...
14>>> list(filter(is_positive, numbers))
15[1, 2]

1number_list = range(-5, 5)
2less_than_zero = list(filter(lambda x: x < 0, number_list))
3print(less_than_zero)
4
5# Output: [-5, -4, -3, -2, -1]
6

1            method  number  orbital_period   mass  distance  year
20  Radial Velocity       1          269.30   7.10     77.40  2006
32  Radial Velocity       1          763.00   2.60     19.84  2011
43  Radial Velocity       1          326.03  19.40    110.62  2007
56  Radial Velocity       1         1773.40   4.64     18.15  2002
67  Radial Velocity       1          798.50    NaN     21.41  1996
7