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import os
print(os.path.dirname(os.path.realpath(__file__)))

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import sys
sys.version_info

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"""
sys:
Return the size of an object in bytes.The object can be any type of object.
All built-in objects will return correct results, but this does not have to
hold true for third-party extensions as it is implementation specific.

pandas/polars:
Returns the size of an object in KB/MB/GB. Checking the dtypes will be
informative (e.g., float64 likely to use more space than int8).
"""

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import os

os.path.exists('xxx.txt')

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a = "x"
b = 1
c = 1.2

print(a.__class__.__name__)  # str
print(b.__class__.__name__)  # int
print(c.__class__.__name__)  # float

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a = 1

'a' in locals()  # True
'z' in locals()  # False

'a' in globals()  # True
'z' in globals()  # False

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mylist = ['a', 'b', 'c', 'd']

# Remove item 1
mylist.pop(1) #'b'
print(l) #['a', 'c', 'd']

# Remove item with value 'd'
mylist.remove('d')
print(l) # ['a', 'c']

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import heapq

print(heapq.nlargest(3, [10, 5, 3, 8, 4, 2]))  # [10, 8, 5]

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l1 = [1,2,3]
l2 = [4,5,6]
print(list(zip(l1, l2))) #[(1, 4), (2, 5), (3, 6)]

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z = zip(*[(1, 2), (3, 4), (5, 6)])
l1, l2 = map(list, z)
print(l1) #[1, 3, 5]
print(l2) #[2, 4, 6]