python - 我想在 pdf 中创建粗体和普通文本

Question

我可以使用reportlab从txt文件创建pdf文件。这很容易，但我想做一些文本是粗体，一些是正常的，一些是斜体。我怎样才能做到这一点？

Answer 1

their documentation中有一些很好的见解。粗略地说，任何字体的粗体和斜体版本实际上都是不同的字体。所以当你想改变字体时，只需设置字体即可。这可能会收紧，但对我有用:

import reportlab
import os
from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfmetrics 
from reportlab.pdfbase.ttfonts import TTFont  

canv = canvas.Canvas("fonts_demo.pdf")

font_variants = ("DejaVuSans","DejaVuSans-Oblique","DejaVuSans-Bold")
folder = '/usr/share/fonts/truetype/dejavu/'
for variant in font_variants:
    pdfmetrics.registerFont(TTFont(variant, os.path.join(folder, variant+'.ttf'))) 

""" I could have registered each font with a line like this... 
pdfmetrics.registerFont(TTFont(DejaVuSans, os.path.join(folder,'DejaVuSans.ttf')))
but I like just making a list of my fonts and then iterating through it. """

## 0,0 is the bottom left corner of the page
## and there are 72 dots per inch, so on an 8.5 inch page
## the top left corner is at 8.5 * 72
## canvas actually generates an A4 sheet, but this is close enough.
x = 0; y = 8.5 * 72
canv.setFont('DejaVuSans-Bold', 30) 
canv.drawString(x,y,"This is bold")

## Move down one inch to draw the next line:
y = y - 72 
canv.setFont('DejaVuSans-Oblique', 30) 
canv.drawString(x,y,"This is oblique, aka italic")


## Move down one inch again:
y = y - 72
canv.setFont('DejaVuSans', 30) 
canv.drawString(x,y,"This is neither bold nor italic")

## Save your work
canv.save()