Initial commit: Pi calculation benchmark with 34 languages
- Added implementations for: bash, brainfuck, c, cpp, crystal, csharp, d, dart, elixir, erlang, fortran, go, haskell, java, javascript, julia, kotlin, objective-c, scala, typescript, lua, nim, odin, perl, php, python, r, ruby, rust, swift, zig, assembly, vimscript, wolfram - All implementations use Machin's formula: π/4 = 4*arctan(1/5) - arctan(1/239) - Build system with ./build.sh, test system with ./test.sh - Performance testing with ./run_all.sh - Comprehensive README.md explaining performance differences - Test framework verifies correctness against known π values
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Ein Anderssono
Executable
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#!/bin/bash
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# Python Build Script - Python är interpreterat, ingen kompilering behövs
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SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
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cd "$SCRIPT_DIR"
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echo "=== Python Build ==="
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echo "Python är ett interpreterat språk, ingen kompilering behövs."
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echo "Script: src/print_hej.py"
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echo ""
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echo "Skapar wrapper script i bin/"
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mkdir -p bin
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cat > bin/print_hej << 'EOF'
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#!/bin/bash
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SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
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cd "$SCRIPT_DIR"
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python3 src/print_hej.py "$@"
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EOF
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chmod +x bin/print_hej
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echo "✓ Klart!"
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Executable
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#!/usr/bin/env python3
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"""
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Beräknar pi med angivet antal decimaler
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Användning: python3 print_hej.py <antal_decimaler>
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"""
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import sys
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from decimal import Decimal, getcontext
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def arctan(x, precision):
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"""
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Beräknar arctan(1/x) med Taylor-serien
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arctan(1/x) = 1/x - 1/(3*x^3) + 1/(5*x^5) - ...
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"""
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result = Decimal(0)
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x = Decimal(x)
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x_squared = x * x
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term = Decimal(1) / x
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sign = 1
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for n in range(1000000):
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divisor = Decimal(2 * n + 1)
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contrib = term / divisor
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if sign > 0:
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result += contrib
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else:
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result -= contrib
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term = term / x_squared
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sign = -sign
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# Avbryt om termen är tillräckligt liten
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if term < Decimal(10) ** (-precision - 10):
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break
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return result
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def calculate_pi(decimals):
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"""
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Beräknar pi med Machins formel: pi/4 = 4*arctan(1/5) - arctan(1/239)
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"""
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# Sätt precision
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getcontext().prec = decimals + 20
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atan1_5 = arctan(5, decimals)
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atan1_239 = arctan(239, decimals)
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# pi = 4 * (4*arctan(1/5) - arctan(1/239))
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pi = Decimal(4) * atan1_5
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pi = pi - atan1_239
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pi = pi * Decimal(4)
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return pi
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def main():
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# Hämta antal decimaler från argument
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if len(sys.argv) > 1:
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try:
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decimals = int(sys.argv[1])
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if decimals < 1:
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decimals = 100
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except ValueError:
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decimals = 100
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else:
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decimals = 100
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# Beräkna pi
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pi = calculate_pi(decimals)
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# Skriv ut resultatet med rätt antal decimaler
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pi_str = str(pi)
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# Hitta decimalpunkten
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if '.' in pi_str:
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int_part, dec_part = pi_str.split('.')
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# Ta exakt decimals decimaler
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if len(dec_part) > decimals:
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dec_part = dec_part[:decimals]
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else:
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dec_part = dec_part.ljust(decimals, '0')
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print(f"{int_part}.{dec_part}")
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else:
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print(pi_str)
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if __name__ == "__main__":
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main()
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#!/usr/bin/env python3
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"""
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Unit tests for Python pi calculation using pytest
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"""
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import subprocess
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import pytest
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SCRIPT_PATH = "/Users/einand/Code/test/python/print_hej.py"
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def run_script(decimals=None):
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"""Run the Python script with optional decimals argument"""
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cmd = ["python3", SCRIPT_PATH]
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if decimals is not None:
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cmd.append(str(decimals))
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result = subprocess.run(cmd, capture_output=True, text=True)
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return result.stdout.strip()
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class TestPiCalculation:
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"""Test cases for pi calculation"""
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def test_10_decimals(self):
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"""Test with 10 decimal places"""
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result = run_script(10)
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expected = "3.1415926535"
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assert result == expected, f"Expected {expected}, got {result}"
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def test_5_decimals(self):
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"""Test with 5 decimal places"""
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result = run_script(5)
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expected = "3.14159"
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assert result == expected, f"Expected {expected}, got {result}"
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def test_1_decimal(self):
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"""Test with 1 decimal place"""
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result = run_script(1)
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expected = "3.1"
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assert result == expected, f"Expected {expected}, got {result}"
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def test_100_decimals(self):
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"""Test with 100 decimal places"""
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result = run_script(100)
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expected = "3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679"
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assert result == expected, f"Expected {expected}, got {result}"
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def test_default_100_decimals(self):
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"""Test default (100 decimal places)"""
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result = run_script()
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expected = "3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679"
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assert result == expected, f"Expected {expected}, got {result}"
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def test_invalid_input(self):
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"""Test with invalid input (should use default 100)"""
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result = run_script("invalid")
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expected = "3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679"
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assert result == expected, f"Expected {expected}, got {result}"
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def test_10000_decimals(self):
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"""Test with 10000 decimal places"""
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result = run_script(10000)
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# Check length: "3." + 10000 digits = 10002 characters
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assert len(result) == 10002, f"Expected 10002 characters, got {len(result)}"
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assert result.startswith("3.14159"), f"Result should start with 3.14159, got {result[:10]}"
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if __name__ == "__main__":
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pytest.main([__file__, "-v"])
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Executable
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#!/usr/bin/env python3
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"""
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Unit tests for Python pi calculation
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"""
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import subprocess
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import sys
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SCRIPT_DIR = "/Users/einand/Code/test/python"
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SCRIPT = f"{SCRIPT_DIR}/print_hej.py"
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def run_test(decimals, expected_prefix):
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"""Run the program and check output"""
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result = subprocess.run(
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["python3", SCRIPT, str(decimals)],
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capture_output=True,
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text=True,
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timeout=30
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)
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output = result.stdout.strip()
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if output.startswith(expected_prefix):
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print(f"✓ PASS: {decimals} decimaler - {output[:50]}...")
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return True
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else:
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print(f"✗ FAIL: {decimals} decimaler")
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print(f" Förväntade: {expected_prefix}...")
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print(f" Fick: {output[:100]}")
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return False
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def main():
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print("=== Python Pi-beräkning Unit Tester ===")
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print()
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tests_passed = 0
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tests_failed = 0
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# Test 1: 10 decimaler
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print("Test 1: 10 decimaler")
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if run_test(10, "3.1415926535"):
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tests_passed += 1
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else:
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tests_failed += 1
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print()
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# Test 2: 5 decimaler
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print("Test 2: 5 decimaler")
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if run_test(5, "3.14159"):
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tests_passed += 1
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else:
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tests_failed += 1
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print()
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# Test 3: 1 decimal
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print("Test 3: 1 decimal")
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if run_test(1, "3.1"):
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tests_passed += 1
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else:
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tests_failed += 1
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print()
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# Test 4: 100 decimaler
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print("Test 4: 100 decimaler")
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expected_100 = "3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067"
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if run_test(100, expected_100):
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tests_passed += 1
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else:
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tests_failed += 1
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print()
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# Test 5: Default (100 decimaler)
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print("Test 5: Default (100 decimaler)")
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result = subprocess.run(
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["python3", SCRIPT],
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capture_output=True,
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text=True,
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timeout=30
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)
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output = result.stdout.strip()
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if output.startswith(expected_100):
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print(f"✓ PASS: Default - {output[:50]}...")
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tests_passed += 1
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else:
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print(f"✗ FAIL: Default")
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print(f" Förväntade: {expected_100}...")
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print(f" Fick: {output[:100]}")
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tests_failed += 1
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print()
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# Test 6: Ogiltig input
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print("Test 6: Ogiltig input (ska använda default 100)")
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result = subprocess.run(
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["python3", SCRIPT, "invalid"],
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capture_output=True,
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text=True,
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timeout=30
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)
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output = result.stdout.strip()
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if output.startswith(expected_100):
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print(f"✓ PASS: Ogiltig input hanterad korrekt")
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tests_passed += 1
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else:
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print(f"✗ FAIL: Ogiltig input")
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print(f" Förväntade: {expected_100}...")
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print(f" Fick: {output[:100]}")
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tests_failed += 1
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print()
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# Summary
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print("=== Sammanfattning ===")
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print(f"Passerade: {tests_passed}")
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print(f"Misslyckade: {tests_failed}")
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if tests_failed == 0:
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print("✓ Alla tester passerade!")
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sys.exit(0)
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else:
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print("✗ Några tester misslyckades")
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sys.exit(1)
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if __name__ == "__main__":
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main()
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