python +matplotlib

import numpy as np
import math
import matplotlib.pyplot as plt

xy = [(p, math.exp(p)) for p in \
      np.arange(start = - 2, stop = 2, step = 0.1)]
z = [list(t) for t in zip(*xy)]; x = z[0]; y = z[1]

fig, ax = plt.subplots()
ax.plot(x, y)

plt.show()