python十以内加减法_python生成PDF文件20以内加减法，给上小学的宝宝

# -*- coding: utf-8 -*-

import random

from reportlab import platypus

from reportlab.lib.units import inch

from reportlab.lib.pagesizes import A4, landscape #最后生成横向打印的PDF

from reportlab.lib import colors

def genList():

ret &＃61; set()

while True:

a &＃61; random.randint(1, 20)

b &＃61; random.randint(1, 20)

c &＃61; random.randint(1, 20)

if a &＃43; b &＃43; c <&＃61; 20 and (a > 10 or b > 10 or c > 10):

ret.add( &＃39;%-2d &＃43; %-2d &＃43; %-2d &＃61;&＃39; % (a, b, c) )

if len(ret) &＃61;&＃61; 25: break

while True:

a &＃61; random.randint(1, 20)

b &＃61; random.randint(1, 20)

c &＃61; random.randint(1, 20)

if a &＃43; b <&＃61; 20 and a &＃43; b - c >&＃61; 0 and (a > 10 or b > 10 or c > 10):

ret.add( &＃39;%-2d &＃43; %-2d - %-2d &＃61;&＃39; % (a, b, c) )

if len(ret) &＃61;&＃61; 50: break

while True:

a &＃61; random.randint(1, 20)

b &＃61; random.randint(1, 20)

c &＃61; random.randint(1, 20)

if a - b >&＃61; 0 and a - b &＃43; c <&＃61; 20 and (a > 10 or b > 10 or c > 10):

ret.add( &＃39;%-2d - %-2d &＃43; %-2d &＃61;&＃39; % (a, b, c) )

if len(ret) &＃61;&＃61; 75: break

while True:

a &＃61; random.randint(11, 20)

b &＃61; random.randint(1, 20)

c &＃61; random.randint(1, 20)

if a - b - c >&＃61; 0 and (a > 10 or b > 10 or c > 10):

ret.add( &＃39;%-2d - %-2d - %-2d &＃61;&＃39; % (a, b, c) )

if len(ret) &＃61;&＃61; 100: break

ret &＃61; list(ret)

random.shuffle(ret)

return ret

&＃39;&＃39;&＃39;for i in genList():

print i&＃39;&＃39;&＃39;

def genTable():

data &＃61; []

items &＃61; genList()

for i in range(0, len(items), 5):

data.append(items[i:i&＃43;5])

# Courier 是 reportlab 缺省定义的等宽字体

# (0,0)/(-1,-1)说的是style运用范围&＃xff0c;从左上到右下

tablestyle &＃61; [(&＃39;FONT&＃39;, (0,0), (-1,-1), &＃39;Courier&＃39;, 12),

(&＃39;LINEAFTER&＃39;, (0,0), (-2,-1), 1, colors.black)]

return platypus.Table(data, 2.2*inch, 0.35*inch, tablestyle)

import sys

try:

n &＃61; int(sys.argv[1]) #恩恩&＃xff0c;生成一个多页的PDF

except:

n &＃61; 1

try:

fname &＃61; sys.argv[2]

except:

fname &＃61; &＃39;20plus100.pdf&＃39;

doc &＃61; platypus.SimpleDocTemplate(fname, topMargin&＃61;0.5*inch, bottomMargin&＃61;0.5*inch, title&＃61;&＃39;DaDa Math&＃39;, author&＃61;&＃39;qyb&＃39;)

elements &＃61; []

for i in range(n):

elements.append(genTable())

elements.append(platypus.flowables.PageBreak())

doc.pagesize &＃61; landscape(A4)

doc.build(elements)

这个 功能需要用到python  的reportlab  包&＃xff0c;&＃xff0c;请下载安装

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2009-12-24 16:00

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