如何一次生成多个matplotlib图表?

保存后只需关闭figure对象。

def do_pie(fic,data):
    import pylab    
    # make a square figure and axes
    pylab.figure(1, figsize=(6,6))
    ax = pylab.axes([0.1, 0.1, 0.8, 0.8])
    pylab.pie(data,labels=data)
    pylab.title(fic, bbox={'facecolor':'0.8', 'pad':5})
    pylab.savefig('%s.png' % fic,dpi=100)
    pylab.close()

例如,可以将图形实例存储在dict中,并在程序结束时输出所有图形:

figures = dict()

def do_pie(fic,data):
    import pylab    

    # make a square figure and axes
    figures[fic] = pylab.figure(figsize=(6,6))
    ax = pylab.axes([0.1, 0.1, 0.8, 0.8])

    pylab.pie(data,labels=data)
    pylab.title(fic, bbox={'facecolor':'0.8', 'pad':5})

do_pie('tarte',[10,20,30])
do_pie('gateau',[33,44])

for fig in figures:
    figures[fig].savefig('%s.png' % fic, dpi=100)