Python XI

Mary PW Chin 钱碧慧博士
PhD (Wales), MSc (Surrey)
E-mail:

1st bite of Python

Printing

2nd bite of Python

Loops

3rd bite of Python

If-elif-else

4th bite of Python

Nested loops

5th bite of Python

Input, while, tables

6th bite of Python

Strings

7th bite of Python

Simple maths

8th bite of Python

More loops

9th bite of Python

Dictionaries

10th bite of Python

Drawing

11th bite of Python

Statistics & histograms

12th bite of Python

Pretty nets

13th bite of Python

Medical scans

14th bite of Python

Handwriting recognition

15th bite of Python

Flower recognition

Processing weather data

Data files:

☞ download vancouver_mean_temp.txt

☞ download stockholm_mean_temp.txt

Synopsis
  1. Module matplotlib and its plot method;
  2. len built-in function;
  3. Reading and splitting strings from text files;
  4. Formatted printing;
  5. String arrays;
  6. 2D arrays;
  7. Descriptive statistics: mean, min, max, variance, standard deviation;
  8. Histograms.
Do not forget

For every program you encounter it is always an excellent exercise to change the variable names to names which are most meaningful to you, then make the program run. You will gain deeper understanding of the program. You will see the program in a new light. Everyone is different: variable names most intuitive to me differ from variable names most intuitive to you. My programs are written with variable names most intuitive to me, so you should change them to names most intuitive to you so that the program flow becomes more obvious.

Exercise
  1. For program version #2, mark out the:
    • variable names;
    • arguments;
    • functions;
    • keywords;
    • modules;
    • methods.
  2. Repeat Exercise 1 with program version #5.
  3. Repeat Exercise 1 with program version #6.
  4. Repeat Exercise 1 with program version #9.
  5. Draw the flowchart for program version #5.
  6. Draw the flowchart for program version #6.
  7. Draw the flowchart for program version #9.
  8. In this lesson we made multiple revisions to the program. Summarise the improvement in each version in three columns:
    versionimprovement in plain Englishtechnical modification in Python
    #1 to #2
    #2 to #3
    #3 to #4
    #11 to #12

    versionimprovement in plain Englishtechnical modification in Python
    #13 to #14
    #17 to #18
External goodies

Map gallery

☞ How to clear browser cache

1st bite of Python

Printing

2nd bite of Python

Loops

3rd bite of Python

If-elif-else

4th bite of Python

Nested loops

5th bite of Python

Input, while, tables

6th bite of Python

Strings

7th bite of Python

Simple maths

8th bite of Python

More loops

9th bite of Python

Dictionaries

10th bite of Python

Drawing

11th bite of Python

Statistics & histograms

12th bite of Python

Pretty nets

13th bite of Python

Medical scans

14th bite of Python

Handwriting recognition

15th bite of Python

Flower recognition