python fpdf中multi_cell实现自动换行

python 使用fpdf中的write不能实现自动换行，而multi_cell可以实现自动换行，具体看下面的代码

# Import FPDF class
from fpdf import FPDF

# Create instance of FPDF class
# Letter size paper, use inches as unit of measure
pdf=FPDF(format='letter', unit='in')

# Add new page. Without this you cannot create the document.
pdf.add_page()

# Remember to always put one of these at least once.
pdf.set_font('Times','',10.0) 

# Long meaningless piece of text
loremipsum = """Lorem ipsum dolor sit amet, vel ne quando dissentias. \
Ne his oporteat expetendis. Ei tantas explicari quo, sea