Installing pygal under Ubuntu 18.04

[ybeco]

Hi
Here is the output :

Output:
Python 3.7.0b3 (default, Mar 30 2018, 04:35:22) 
[GCC 7.3.0] on linux
Type "copyright", "credits" or "license()" for more information.
>>> import pygal
>>> print(dir(pygal))
['Bar', 'BaseMap', 'Box', 'CHARTS', 'CHARTS_BY_NAME', 'CHARTS_NAMES', 'Config', 'DateLine', 'DateTimeLine', 'Dot', 'Funnel', 'Gauge', 'Graph', 'Histogram', 'HorizontalBar', 'HorizontalLine', 'HorizontalStackedBar', 'HorizontalStackedLine', 'Line', 'Pie', 'PluginImportFixer', 'Pyramid', 'Radar', 'SolidGauge', 'StackedBar', 'StackedLine', 'TimeDeltaLine', 'TimeLine', 'Treemap', 'VerticalPyramid', 'XY', '__about__', '__author__', '__builtins__', '__cached__', '__copyright__', '__doc__', '__email__', '__file__', '__license__', '__loader__', '__name__', '__package__', '__path__', '__spec__', '__summary__', '__title__', '__uri__', '__version__', '_compat', 'adapters', 'colors', 'config', 'etree', 'formatters', 'graph', 'interpolate', 'maps', 'pkg_resources', 'serie', 'state', 'stats', 'style', 'svg', 'sys', 'traceback', 'util', 'view', 'warnings']
>>> 

Pie is here...
My list is the same as yours...

My version is "Python 3.7.0b3". Can this be the source of the problem?