Gain insights into using Python for scientific and engineering applications. Delve into real-world scenarios, learning NumPy, Matplotlib, audio processing, and more through practical, hands-on projects.

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jupter.tar.gz

notebook

obesity_plot_gender

print_gender_pandas

create_sine_wave

notebook_exercise

range

print_gender_pandas_remove_NaN

print_gender_year

print_data_age

print_data_age_with_year

print_data_age_remove_NaN

obesity_plot_age_simple

obesity_plot_age_clear

print_data_age_under_16

print_data_age_25_34

obesity_plot_children_vs_adults

print_movie_top_rated

print_movies_oldie_teen

print_movies_by_gender

print_movies_for_women

print_movies_by_gender_loc

print_movies_diff_gender

movies_diff_gender_plot

print_u_data

print_movies_oldie_index

print_movies_oldies

print_movies_teens

display_image_nouse

grey_image

blur_image

edge_detection_low

edge_detection_high

plot_sin_wave

create_wave_file

display_again

print_frequencies

count_objects

detect_faces

detect_faces_little_mix

count_exact_lines

webcam_detection

single_thread

find_correlation

webcam_face_detection

motion_detection

motion_detection_live

In this course, you will learn to use Python for real-world scientific/engineering applications. For each topic, there will be a real case scenario where you will build a quick solution in Python to solve the problem.

More specifically, you will cover topics such as creating a word counter, NumPy and Matplotlib, audio processing, and a lot more. Throughout each chapter, you will get hands-on experience in building solutions for complex problems that engineers and scientists face every day.

The Practical Guide to Python for Scientists and Engineers

# Removing empty lines

Here, we'll learn how to write a piece of code that will remove all the empty lines.

We’ve written a piece of code that contains a `for` loop. This will remove all the lines that are empty.

```
for l in lines:
    if not l:
        lines.remove(l)

```

Let's go over this line by line.
```
for l in lines:
```

We’re looping over our list lines. `l` will contain each line as Python is looping over them.

> **Note**:  If you come from a C/C++ background, you might be surprised that we’re not using arrays. We simply don’t need to!

Python will do that for us automatically. It will take the list lines and automatically loop over them. We don’t need to write `lines[0]`, `lines[1]`, `lines[2]`, and so forth. In fact, doing so is an anti-pattern.

Now that we have each line, we need to check if it’s empty. There are many ways to do it. One is:

```
if len(l) == 0:
```

This checks if the current line has a length of 0. This works well, but there is a more elegant way:

```
if not l:
    lines.remove(l)
```

# The `not` keyword in Python

The **`not`** keyword in Python will automatically check for emptiness. If the line is empty, we’ll remove it from the list using the remove() command.

>**Note**: Like the `for` loop, we need to give four spaces to let Python know that this instruction is under the if condition.

The above lines of code have already been added into the code widget below for our ease.  

Now we should have the correct number of lines when we add the above code in the coding widget below.

 


We will learn how to count the number of lines in a file by ignoring the empty lines.

Count the Number of Exact Lines

Introduction

Create a Word Counter in Python

An Introduction to NumPy and Matplotlib

Python pandas

Audio Processing

Image and Video Processing

MultiThreading vs. Multiprocessing in Python

Machine Learning with an Amazon-like Recommendation Engine

Conclusion

Count the Number of Exact Lines

Removing empty lines