Wrong Convertation? | Preprocessing Data: Part II
Analyzing and Visualizing Real-World Data

# Wrong Convertation?

Well, we have found out that the initial data contains dates in the format dd-mm-yyyy. The `datetime` module reads dates in the yyyy-mm-dd format, which is fine. However, how will `datetime` convert the date `2010-05-02`? Since we are familiar with the dataset, we know that it represents February 5, 2010. But `datetime` doesn't know this and may consider this date as May 2, 2010. Let's check if this has happened in our data.

Unfortunately, it has. Let's compare the first three dates in their initial and converted formats:

 Initial date Converted date 05-02-2010 2010-05-02 12-02-2010 2010-12-02 19-02-2010 2010-02-19

It is visible that for the first two dates, the left numbers were chosen as months, while for the third date, the left number was chosen as the day (the correct approach). Therefore, we need to make `pandas` understand the format of the dates we are working with.

Все було зрозуміло?

Секція 2. Розділ 4

Зміст курсу

Analyzing and Visualizing Real-World Data

# Wrong Convertation?

Well, we have found out that the initial data contains dates in the format dd-mm-yyyy. The `datetime` module reads dates in the yyyy-mm-dd format, which is fine. However, how will `datetime` convert the date `2010-05-02`? Since we are familiar with the dataset, we know that it represents February 5, 2010. But `datetime` doesn't know this and may consider this date as May 2, 2010. Let's check if this has happened in our data.

Unfortunately, it has. Let's compare the first three dates in their initial and converted formats:

 Initial date Converted date 05-02-2010 2010-05-02 12-02-2010 2010-12-02 19-02-2010 2010-02-19

It is visible that for the first two dates, the left numbers were chosen as months, while for the third date, the left number was chosen as the day (the correct approach). Therefore, we need to make `pandas` understand the format of the dates we are working with.

Все було зрозуміло?

Секція 2. Розділ 4