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"""

Validate Coordinates

Validate if given parameters are valid geographical coordinates.

Latitude must be between -90 and 90, longitude between -180 and 180.

Reference: https://en.wikipedia.org/wiki/Geographic_coordinate_system

Complexity:

Time: O(n) where n is the length of the coordinate string

Space: O(1)

"""

from __future__ import annotations

import re

def is_valid_coordinates_0(coordinates: str) -> bool:

"""Validate coordinates by character checking and parsing.

Args:

coordinates: A string of the form "lat, lng".

Returns:

True if the coordinates are valid, False otherwise.

Examples:

>>> is_valid_coordinates_0("-23, 25")

True

"""

for char in coordinates:

if not (char.isdigit() or char in ["-", ".", ",", " "]):

return False

parts = coordinates.split(", ")

if len(parts) != 2:

return False

try:

latitude = float(parts[0])

longitude = float(parts[1])

except ValueError:

return False

return -90 <= latitude <= 90 and -180 <= longitude <= 180

def is_valid_coordinates_1(coordinates: str) -> bool:

"""Validate coordinates by splitting and converting to floats.

Args:

coordinates: A string of the form "lat, lng".

Returns:

True if the coordinates are valid, False otherwise.

Examples:

>>> is_valid_coordinates_1("43.91343345, 143")

True

"""

try:

latitude, longitude = [

abs(float(part)) for part in coordinates.split(",") if "e" not in part

]

except ValueError:

return False

return latitude <= 90 and longitude <= 180

def is_valid_coordinates_regular_expression(coordinates: str) -> bool:

"""Validate coordinates using a regular expression.

Args:

coordinates: A string of the form "lat, lng".

Returns:

True if the coordinates are valid, False otherwise.

Examples:

>>> is_valid_coordinates_regular_expression("4, -3")

True

"""

return bool(

re.match(

r"-?(\d|[1-8]\d|90)\.?\d*, -?(\d|[1-9]\d|1[0-7]\d|180)\.?\d*$",

coordinates,

)

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