March 12, 2019
A simple script for displaying how loops work.
i = 0
numbers = []
while i < 8:
print "At the top i is now %d" % i
numbers.append(i)
i = i + 1
print "Numbers now:", numbers
print "Number at the bottom is now: %d" % i
print "The numbers:"
for num in numbers:
print num
March 04, 2019
Here is a slightly modified script for the Salary Calculator. This time we are writing the result to a text file. Some folks over on the Python forum helped me with target.write(str(round(total, 2)).encode()) as I could not figure a way to round the decimal place correctly.
# -*- encoding: utf-8 -*-
from sys import argv
script, answer = argv
def salary(weeks, payments):
return (weeks * payments)
weeks = (float(raw_input("Weeks: ")))
payments = (float(raw_input("Payments: ")))
total = salary(weeks, payments)
target = open(answer, 'w')
target.truncate()
target.write(str(round(total, 2)).encode())
target.close()
February 27, 2019
This script uses quite a few new things including a function. It calculates two user input values and then gives an answer depending on the outcome. The user is asked for the number of weeks and the payment each week.
# -*- encoding: utf-8 -*-
def salary(weeks, payments):
return (weeks * payments)
weeks = (float(raw_input("Weeks: ")))
payments = (float(raw_input("Payments: ")))
total = salary(weeks, payments)
print "\nThe total is {0:.2f}".format (total)
if total < 7999 or total == 7999:
print "That's not good enough.\n"
else:
print "You are on target.\n"
The script also uses float and format for currencies and values that use decimal places. Don't forget to declare -*- encoding: utf-8 -*- at the beginning of the script.
February 25, 2019
These few lines of code are useful to calculate the size of a file. Later, we'll combine it with another script.
from sys import argv
script, filename = argv
a1 = open(filename)
data = a1.read()
print "The size of the file is %r bytes." % len (data)
February 18, 2019
In the last script, I mentioned about condensing the lines down. It's actually very simple to do. Just insert a semi-colon between lines.
For example:
from sys import argv script, filename becomes from sys import argv;script, filename
If you apply this in your scripts, things become much more manageable to read. Here is the previous script with the new additions.
from sys import argv;script, file_name = argv
print "Hello. let's erase the contents of the file called: '%s'." % file_name
print "If you do not want this, hit CTRL-C."
raw_input("?")
print "Opening file..."
target = open(file_name, 'w');target.truncate()
print "Contents now erased."
line1 = raw_input("Line 1: ");line2 = raw_input("Line 2: ");line3 = raw_input("Line 3: ")
print "Writing three lines..."
target.write(line1);target.write("\n");target.write(line2);target.write("\n");target.write(line3);target.write("\n")
print "Done.";print "Let's close the file."
target.close()
print "All finished."
As you can see, most of the time is saved with the part where the script asks for raw_input and when using target.write.