reportlab使用示例:文字和圖片
阿新 • • 發佈:2019-01-11
Python的reportlab專門將資料使用生成PDF中的圖形和文件功能,
下載ReportLab
生成一個簡單的helloworld
from reportlab.graphics.shapes import Drawing, String from reportlab.graphics import renderPDF d = Drawing(100, 100) s = String(50, 50, 'Hello, world!', textAnchor='middle') d.add(s) renderPDF.drawToFile(d, 'hello.pdf', 'A simple PDF file')
三條折線
from reportlab.lib import colors from reportlab.graphics.shapes import * from reportlab.graphics import renderPDF data = [ # Year Month Predicted High Low (2007, 8, 113.2, 114.2, 112.2), (2007, 9, 112.8, 115.8, 109.8), (2007, 10, 111.0, 116.0, 106.0), (2007, 11, 109.8, 116.8, 102.8), (2007, 12, 107.3, 115.3, 99.3), (2008, 1, 105.2, 114.2, 96.2), (2008, 2, 104.1, 114.1, 94.1), (2008, 3, 99.9, 110.9, 88.9), (2008, 4, 94.8, 106.8, 82.8), (2008, 5, 91.2, 104.2, 78.2), ] drawing = Drawing(200, 150) pred = [row[2]-40 for row in data] high = [row[3]-40 for row in data] low = [row[4]-40 for row in data] times = [200*((row[0] + row[1]/12.0) - 2007)-110 for row in data] drawing.add(PolyLine(zip(times, pred), strokeColor=colors.blue)) drawing.add(PolyLine(zip(times, high), strokeColor=colors.red)) drawing.add(PolyLine(zip(times, low), strokeColor=colors.green)) drawing.add(String(65, 115, 'Sunspots', fontSize=18, fillColor=colors.red)) renderPDF.drawToFile(drawing, 'report1.pdf', 'Sunspots')
最終的sunspot
from urllib import urlopen from reportlab.graphics.shapes import * from reportlab.graphics.charts.lineplots import LinePlot from reportlab.graphics.charts.textlabels import Label from reportlab.graphics import renderPDF URL = 'http://www.swpc.noaa.gov/ftpdir/weekly/Predict.txt' COMMENT_CHARS = '#:' drawing = Drawing(400, 200) data = [] for line in urlopen(URL).readlines(): if not line.isspace() and not line[0] in COMMENT_CHARS: data.append([float(n) for n in line.split()]) pred = [row[2] for row in data] high = [row[3] for row in data] low = [row[4] for row in data] times = [row[0] + row[1]/12.0 for row in data] lp = LinePlot() lp.x = 50 lp.y = 50 lp.height = 125 lp.width = 300 lp.data = [zip(times, pred), zip(times, high), zip(times, low)] lp.lines[0].strokeColor = colors.blue lp.lines[1].strokeColor = colors.red lp.lines[2].strokeColor = colors.green drawing.add(lp) drawing.add(String(250, 150, 'Sunspots', fontSize=14, fillColor=colors.red)) renderPDF.drawToFile(drawing, 'report2.pdf', 'Sunspots')