You can specifiy how the values are displayed on the tooltip using a lambda function. The code below shows the values to 2 decimal places.
chart = pygal.Line() chart.add('line', [.070106781, 1.414213562, 3.141592654]) chart.value_formatter = lambda x: "%.2f" % x
Same on x axis for xy like charts:
chart = pygal.XY() chart.add('line', [(12, 31), (8, 28), (89, 12)]) chart.x_value_formatter = lambda x: '%s%%' % x
When using pygal to display static charts for printing for example you can chose to activate this option to print all values as text.
from pygal.style import DefaultStyle chart = pygal.Bar(print_values=True, style=DefaultStyle( value_font_family='googlefont:Raleway', value_font_size=30, value_colors=('white',))) chart.add('line', [0, 12, 31, 8, 28, 0])
Show print_values only on legend hover.
from pygal.style import DefaultStyle chart = pygal.Bar(dynamic_print_values=True, style=DefaultStyle( value_font_family='googlefont:Raleway', value_font_size=30, value_colors=('white',))) chart.add('line', [0, 12, 31, 8, 28, 0])
zero values are shown by default but you can use this option to hide them.
chart = pygal.Bar(print_values=True, print_zeroes=False) chart.add('line', [0, 12, 31, 8, 28, 0])
You can activate value label display:
chart = pygal.Bar(print_labels=True) chart.add('line', [ 0, {'value': 12, 'label': 'Twelve'}, 31, {'value': 8, 'label': 'eight'}, 28, 0 ])
Displaying both is also possible:
chart = pygal.Bar(print_labels=True, print_values=True) chart.add('line', [ 0, {'value': 12, 'label': 'Twelve'}, 31, {'value': 8, 'label': 'eight'}, 28, 0 ])
Display values in human readable form:
1 230 000 -> 1.23M
.00 098 7 -> 987µchart = pygal.Line(human_readable=True) chart.add('line', [0, .0002, .0005, .00035])
Text to display instead of the graph when no data is supplied:
chart = pygal.Line() chart.add('line', [])
from pygal.style import DefaultStyle chart = pygal.Line(no_data_text='No result found', style=DefaultStyle(no_data_font_size=40)) chart.add('line', [])