把图片从A3转A4，还可以附加不用转的文件，最后合成PDF
把A3图片放入doc_path下的img目录，A4图片放入plus目录
如果需要调整顺序，请在放入前起好名字
输出会按文件名进行排序，
import os
from PIL import Image
import img2pdf
class A4Pdf:
def __init__(self, doc_path):
self.doc_path = doc_path
# 创建相关目录
self.img_path = os.path.join(self.doc_path, "img")
self.plus_path = os.path.join(self.doc_path, "plus")
self.a4_path = os.path.join(self.doc_path, "a4")
for path in [
self.img_path,
self.plus_path,
self.a4_path,
]:
if not os.path.exists(path):
os.makedirs(path)
def checkfile(self):
img_files = os.listdir(self.img_path)
print(self.img_path, img_files)
img_files = os.listdir(self.plus_path)
print(self.plus_path, img_files)
def a3toa4(self):
try:
img_files = os.listdir(self.img_path)
for idx, i in enumerate(img_files):
# i = img_files[idx]
if i.endswith(".jpg") or i.endswith(".png"):
infile = os.path.join(self.img_path, i)
# print(infile)
img = Image.open(infile)
size_img = img.size
# 准备将图片切割成2张小图片,这里后面的2是开根号以后的数，比如你想分割为9张，将2改为3即可
weight = int(size_img[0] // 2)
height = int(size_img[1])
for k in range(2):
box = (weight * k, 0, weight * (k + 1), height)
region = img.crop(box)
# 输出路径
outfile = "{}/{}-{}.jpg".format(self.a4_path, idx, k)
print(f"A3TOA4：{outfile}")
region.save(outfile)
except Exception as e:
print(f"A3TOA4出现错误: {e}")
def merge_pdf(self, pdf_name):
with open(pdf_name, "wb") as f:
imgs = []
for fname in os.listdir(self.a4_path):
if not fname.endswith(".jpg") and not fname.endswith(".png"):
continue
path = os.path.join(self.a4_path, fname)
imgs.append(path)
for fname in os.listdir(self.plus_path):
if not fname.endswith(".jpg") and not fname.endswith(".png"):
continue
path = os.path.join(self.plus_path, fname)
imgs.append(path)
# 输出会按文件名进行排序
imgs.sort(key=lambda x: os.path.basename(x))
# 按文件名进行排序
print("merge_pdf：", imgs)
f.write(img2pdf.convert(imgs))
print("输出文件", pdf_name)
def proc():
doc_path = r"D:\EMC2\w\PDF分割-去水印记录\0403"
"""
把A3图片放入doc_path下的img目录，A4图片放入plus目录
如果需要调整顺序，请在放入前起好名字
输出会按文件名进行排序，
"""
# 输出的文件名
pdf_name = os.path.join(doc_path, "合成.pdf")
# 建个实例
task = A4Pdf(doc_path)
# A3图片是左右对切
task.a3toa4()
# 合成文件
task.merge_pdf(pdf_name)
if __name__ == "__main__":
proc()
