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import numpy as np
from pysr import pysr
X = np.random.randn(100, 5)
print("Test 1 - defaults; simple linear relation")
y = X[:, 0]
equations = pysr(X, y,
niterations=10)
print(equations)
assert equations.iloc[-1]['MSE'] < 1e-4
print("Test 2 - test custom operator")
y = X[:, 0]**2
equations = pysr(X, y,
unary_operators=["sq(x) = x^2"], binary_operators=["plus"],
extra_sympy_mappings={'square': lambda x: x**2},
niterations=10)
print(equations)
assert equations.iloc[-1]['MSE'] < 1e-4
X = np.random.randn(100, 1)
y = X[:, 0] + 3.0
print("Test 3 - empty operator list, and single dimension input")
equations = pysr(X, y,
unary_operators=[], binary_operators=["plus"],
niterations=10)
print(equations)
assert equations.iloc[-1]['MSE'] < 1e-4
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