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60 lines
1.4 KiB
Markdown
60 lines
1.4 KiB
Markdown
# Migration to version 0.22
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## Python 3 transition
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Python 2 is [deprecated](https://www.python.org/doc/sunset-python-2/) since January 1st, 2020. The Clover platform moves to Python 3.
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For running flight script instead of `python` command:
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```bash
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python flight.py
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```
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use `python3` command:
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```bash
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python3 flight.py
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```
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Python 3 has certain syntax differences in comparison with the old version. Instead of `print` *operator*:
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```python
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print 'Clover is the best' # this won't work
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```
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use `print` *function*:
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```python
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print('Clover is the best')
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```
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The division operator operates floating points by default (instead of integer). Python 2:
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```python
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>>> 10 / 4
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2
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```
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Python 3:
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```python
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>>> 10 / 4
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2.5
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```
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For strings `unicode` type is used by default (instead of `str` type).
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Encoding specification (`# coding: utf8`) is not necessary any more.
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More details on all the language changes see in [appropriate article](https://sebastianraschka.com/Articles/2014_python_2_3_key_diff.html).
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## Move to ROS Noetic
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<img src="../assets/noetic.png" width=200>
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ROS Melodic version was updated to ROS Noetic. See the full list of changes in the [ROS official documentation](http://wiki.ros.org/noetic/Migration).
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## Changes in launch-files
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Configuration of ArUco-markers navigation is simplified. See details in [markers navigation](aruco_marker.md) and [markers map navigation](aruco_map.md) articles.
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