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"""
Height Conversion Tool
A simple and efficient tool for converting height measurements between different units.
"""
from typing import Tuple, Union
import re
class HeightConverter:
"""Main class for height conversions."""
# Conversion constants
INCH_TO_CM = 2.54
FEET_TO_CM = 30.48
FEET_TO_INCH = 12
CM_TO_INCH = 1 / INCH_TO_CM
METER_TO_CM = 100
def __init__(self):
"""Initialize the HeightConverter."""
pass
def feet_to_cm(self, feet: Union[int, float], inches: float = 0) -> float:
"""
Convert feet and inches to centimeters.
Args:
feet: Number of feet
inches: Number of inches (default: 0)
Returns:
Height in centimeters
Examples:
>>> converter = HeightConverter()
>>> converter.feet_to_cm(5, 10)
177.8
"""
if feet < 0 or inches < 0:
raise ValueError("Height values cannot be negative")
total_inches = (feet * self.FEET_TO_INCH) + inches
cm = total_inches * self.INCH_TO_CM
return round(cm, 2)
def cm_to_feet(self, cm: float) -> Tuple[int, float]:
"""
Convert centimeters to feet and inches.
Args:
cm: Height in centimeters
Returns:
Tuple of (feet, inches)
Examples:
>>> converter = HeightConverter()
>>> converter.cm_to_feet(180)
(5, 10.9)
"""
if cm < 0:
raise ValueError("Height cannot be negative")
total_inches = cm * self.CM_TO_INCH
feet = int(total_inches // self.FEET_TO_INCH)
inches = total_inches % self.FEET_TO_INCH
return feet, round(inches, 1)
def meters_to_feet(self, meters: float) -> Tuple[int, float]:
"""
Convert meters to feet and inches.
Args:
meters: Height in meters
Returns:
Tuple of (feet, inches)
Examples:
>>> converter = HeightConverter()
>>> converter.meters_to_feet(1.75)
(5, 8.9)
"""
if meters < 0:
raise ValueError("Height cannot be negative")
cm = meters * self.METER_TO_CM
return self.cm_to_feet(cm)
def feet_to_meters(self, feet: Union[int, float], inches: float = 0) -> float:
"""
Convert feet and inches to meters.
Args:
feet: Number of feet
inches: Number of inches (default: 0)
Returns:
Height in meters
Examples:
>>> converter = HeightConverter()
>>> converter.feet_to_meters(6, 0)
1.83
"""
cm = self.feet_to_cm(feet, inches)
meters = cm / self.METER_TO_CM
return round(meters, 2)
def cm_to_meters(self, cm: float) -> float:
"""
Convert centimeters to meters.
Args:
cm: Height in centimeters
Returns:
Height in meters
"""
if cm < 0:
raise ValueError("Height cannot be negative")
return round(cm / self.METER_TO_CM, 2)
def meters_to_cm(self, meters: float) -> float:
"""
Convert meters to centimeters.
Args:
meters: Height in meters
Returns:
Height in centimeters
"""
if meters < 0:
raise ValueError("Height cannot be negative")
return round(meters * self.METER_TO_CM, 2)
def parse_height_string(self, height_str: str) -> dict:
"""
Parse a height string into its components.
Args:
height_str: Height string (e.g., "5'10\"", "180cm", "1.8m")
Returns:
Dictionary with parsed values and unit
Examples:
>>> converter = HeightConverter()
>>> converter.parse_height_string("5'10\"")
{'feet': 5, 'inches': 10, 'unit': 'feet'}
"""
height_str = height_str.strip().lower()
# Pattern for feet and inches (5'10", 5'10, 5ft10in, etc.)
feet_pattern = r"(\d+)(?:'|ft|feet)\s*(\d+(?:\.\d+)?)?(?:\"|in|inches)?"
match = re.match(feet_pattern, height_str)
if match:
feet = int(match.group(1))
inches = float(match.group(2)) if match.group(2) else 0
return {'feet': feet, 'inches': inches, 'unit': 'feet'}
# Pattern for centimeters (180cm, 180 cm)
cm_pattern = r"(\d+(?:\.\d+)?)\s*cm"
match = re.match(cm_pattern, height_str)
if match:
cm = float(match.group(1))
return {'cm': cm, 'unit': 'cm'}
# Pattern for meters (1.8m, 1.8 m)
m_pattern = r"(\d+(?:\.\d+)?)\s*m(?:eters?)?"
match = re.match(m_pattern, height_str)
if match:
meters = float(match.group(1))
return {'meters': meters, 'unit': 'meters'}
raise ValueError(f"Unable to parse height string: {height_str}")
def convert(self, input_str: str, to_unit: str = "cm") -> str:
"""
Flexible conversion from string input.
Args:
input_str: Height string (e.g., "5'10\"", "180cm", "1.8m")
to_unit: Target unit ("cm", "feet", "meters")
Returns:
Converted height as formatted string
Examples:
>>> converter = HeightConverter()
>>> converter.convert("5'10\"", "cm")
'177.8 cm'
"""
parsed = self.parse_height_string(input_str)
to_unit = to_unit.lower()
# Convert to target unit
if to_unit == "cm":
if parsed['unit'] == 'feet':
result = self.feet_to_cm(parsed['feet'], parsed['inches'])
return f"{result} cm"
elif parsed['unit'] == 'meters':
result = self.meters_to_cm(parsed['meters'])
return f"{result} cm"
else:
return f"{parsed['cm']} cm"
elif to_unit == "feet":
if parsed['unit'] == 'cm':
feet, inches = self.cm_to_feet(parsed['cm'])
return f"{feet}'{inches:.1f}\""
elif parsed['unit'] == 'meters':
feet, inches = self.meters_to_feet(parsed['meters'])
return f"{feet}'{inches:.1f}\""
else:
return f"{parsed['feet']}'{parsed['inches']:.1f}\""
elif to_unit == "meters" or to_unit == "m":
if parsed['unit'] == 'feet':
result = self.feet_to_meters(parsed['feet'], parsed['inches'])
return f"{result} m"
elif parsed['unit'] == 'cm':
result = self.cm_to_meters(parsed['cm'])
return f"{result} m"
else:
return f"{parsed['meters']} m"
else:
raise ValueError(f"Unknown target unit: {to_unit}")
def main():
"""Command line interface for the height converter."""
import argparse
parser = argparse.ArgumentParser(
description='Convert height between different units'
)
parser.add_argument(
'height',
type=str,
help='Height to convert (e.g., "5\'10\"", "180cm", "1.8m")'
)
parser.add_argument(
'--to',
type=str,
default='cm',
choices=['cm', 'feet', 'meters', 'm'],
help='Target unit (default: cm)'
)
args = parser.parse_args()
converter = HeightConverter()
try:
result = converter.convert(args.height, args.to)
print(result)
except ValueError as e:
print(f"Error: {e}")
return 1
return 0
if __name__ == '__main__':
exit(main())
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