power_analysis_1.py

# parameters for the analysis 
effect_size = 0.8
alpha = 0.05 # significance level
power = 0.8

power_analysis = TTestIndPower()
sample_size = power_analysis.solve_power(effect_size = effect_size, 
                                         power = power, 
                                         alpha = alpha)

print('Required sample size: {0:.2f}'.format(sample_size))