python教程分享python使用reportlab生成pdf实例

目录

• intro
• 功能点
• 预览
• 完整代码
• 使用场景1：生成文件
• 使用场景2：web（flask）
• 总结

import os    from reportlab.graphics.charts.lineplots import lineplot  from reportlab.graphics.charts.piecharts import pie  from reportlab.graphics.shapes import drawing  from reportlab.lib import colors  from reportlab.lib.styles import paragraphstyle  from reportlab.pdfbase import pdfmetrics  from reportlab.pdfbase.pdfmetrics import registerfontfamily  from reportlab.pdfbase.ttfonts import ttfont  from reportlab.platypus import paragraph    home = os.path.expanduser("~")    try:      pdfmetrics.registerfont(ttfont("hansans", f"{home}/.fonts/sourcehansanscn-normal.ttf"))      pdfmetrics.registerfont(ttfont("hansans-bold", f"{home}/.fonts/sourcehansanscn-bold.ttf"))      registerfontfamily("hansans", normal="hansans", bold="hansans-bold")      font_name = "hansans"  except:      font_name = "helvetica"      class mycss:      h3 = paragraphstyle(name="h3", fOntname=font_name, fOntsize=14, leading=21, alignment=1)      p = paragraphstyle(name="p", fOntname=font_name, fOntsize=12, leading=18, firstlineindent=24)      class piipdf:      @classmethod      def doh3(cls, text: str):          return paragraph(text, mycss.h3)        @classmethod      def dop(cls, text: str):          return paragraph(text, mycss.p)        @classmethod      def doline(cls):          drawing = drawing(500, 220)          line = lineplot()          line.x = 50          line.y = 50          line.height = 125          line.width = 300          line.lines[0].strokecolor = colors.blue          line.lines[1].strokecolor = colors.red          line.lines[2].strokecolor = colors.green          line.data = [((0, 50), (100, 100), (200, 200), (250, 210), (300, 300), (400, 800))]            drawing.add(line)          return drawing        @classmethod      def dochart(cls, data):          drawing = drawing(abcdefg"]          pie.data = data  # list(range(15, 105, 15))          pie.slices.strokewidth = 0.5            drawing.add(pie)          return drawing  

doc = simpledoctemplate("hello.pdf")    p = piipdf()  doc.build([      p.doh3("水泵能源消耗简报"),      p.doh3("2021.12.1 ~ 2021.12.31"),      p.dop("该月接入能耗管理系统水泵系统 xx 套，水泵 x 台。"),      p.dop("本月最大总功率 xx kw，环比上月增加 xx %，平均功率 xx kw；环比上月增加 xx %。"),      p.dop("功率消耗趋势图："),      p.doline(),      p.dop("本月总能耗 xxx kwh，环比上月增加 xx %。"),      p.dop("分水泵能耗统计："),      p.dochart(list(range(15, 105, 20))),      p.dop("其中能耗最高的水泵为：xxx， 环比上月增加 xxx kwh，xx %。"),  ])  

@controller.get("/api/pdf")  def api_hub_energy_pdf():      buffer = io.bytesio()										# 重点 起一个 io      doc = simpledoctemplate(buffer)        p = piipdf()      doc.build([          p.doh3("2021.12.1 ~ 2021.12.31"),      ])        buffer.seek(0)      return response(											# io 形式返回          buffer,          mimetype="application/pdf",          headers={"content-disposition": "inline; filename=test.pdf"},      )