Below is the syntax highlighted version of stats2.py
from §1.5 Input and Output.
#----------------------------------------------------------------------- # stats2.py #----------------------------------------------------------------------- import stdio import sys import math # Accept integer command-line argument n. Then read n floats from # standard input, and write their mean and standard deviation to # standard output. n = int(sys.argv[1]) # Read the floats. a = [] for i in range(n): a += [stdio.readFloat()] # Compute the mean. total = 0.0 for element in a: total += element mean = total / float(n) # Compute the standard deviation. total2 = 0.0 for element in a: total2 += (element - mean) ** 2 stddev = math.sqrt(total2) / float(n - 1) # Write the results. stdio.writeln('Mean = ' + str(mean)) stdio.writeln('Standard deviation = ' + str(stddev)) #----------------------------------------------------------------------- # python stats2.py 10 # 4 5 8 7 2 0 9 4 3 2 # Mean = 4.4 # Standard deviation = 0.9583937179043479