从终端调用Python脚本

Question

我有以下Python脚本

def application():

    from math import exp
    v = lambda t: 3*(t**2)*exp(t**3)
    n = int(input('n: '))
    numerical = trapezoidal(v, 0, 1, n)
    # Compare with exact result
    V = lambda t: exp(t**3)
    exact = V(1) - V(0)
    error = exact - numerical
    print("n = %d: estimation = %.16f, error: %g"%(n, numerical, error))

def trapezoidal(f,a,b,n):
    h = float(b-a)/n #width
    result = 0.5*f(a) + 0.5*f(b)
    for i in range(1,n):
        result += f(a + i*h)
    result *= h
    return result

名为trapezoidal.py。我无法理解为什么当我从终端（python trapezoidal.py）呼叫它时，我什么都没得到。

Answer 1

您应该定义主要功能

def main():
    # your code here

if __name__ == "__main__":
    main()