这篇文章主要讲解了“如何用Python给二维码图片添加提示文字”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“如何用Python给二维码图片添加提示文字”吧！

判断当前浏览器是否为微信，是的话挑起微信支付，不是的话，显示二维码图片并提示用户到微信中打开

1. 判断是否微信

#toolbox.pyfromtypingimportAnyclassUserAgent:def__init__(self,user_agent:str='',request:Any=None):ifrequestisnotNone:try:user_agent=request.headers.get('user-agent','')#ForSanicexceptAttributeError:user_agent=request.META.get('HTTP_USER_AGENT','')#Djangoself.user_agent=user_agent@propertydefis_alipay(self)->bool:return"AlipayClient/"inself.user_agent@propertydefis_wechat(self)->bool:return"MicroMessenger/"inself.user_agent@propertydefis_qq(self)->bool:return"QQ/"inself.user_agent@propertydefscan_type(self)->str:ifself.is_wechatorself.is_qq:return"wechat"ifself.is_alipay:return"alipay"return"unknown"

2. 给图片加文字

#image_text.py"""给图片（如二维码）添上文字Usage::>>>fromxxximportdeco_image>>>deco_image(image_path,text)#替换旧图片>>>deco_image(image_path,text,new_path,color='red')#保留旧图片并指定文字颜色"""frompathlibimportPathfromtypingimportOptional,Tuple,UnionfromPILimportImage,ImageDraw,ImageFont#pipinstallpillowTIP="请用微信扫码支付或分享到微信中打开"#获取图片宽度defget_img_width(fname)->int:returnImage.open(fname).size[0]#获取图片高度defget_img_height(fname)->int:returnImage.open(fname).size[1]#给图片加文字#生成blank_img空白图片，加上文字之后生成新图片或覆盖旧图,宽度为origin_img原始图片的宽度MARGIN_LEFT,MARGIN_TOP=50,15FONT_SIZE=22FONT_COLOR="red"defgen_text_img(origin_img:Union[Path,str],text:str,img_path=None,color=FONT_COLOR,font_size:int=FONT_SIZE,margin_left:int=MARGIN_LEFT,margin_top:int=MARGIN_TOP,blank_img=None,font_path:Optional[str]=None,show_img:bool=False,)->Union[Path,str]:width=get_img_width(origin_img)ifblank_imgisNone:blank_img=Path(f"/tmp/blank-{width}.png")elifisinstance(blank_img,str):blank_img=Path(blank_img)ifnotblank_img.exists():Image.new("RGB",(width,70),(255,255,255)).save(blank_img)im=Image.open(blank_img)draw=ImageDraw.Draw(im)iffont_pathisNone:#font_path=r"C:WindowsFontssimsun.ttc"#font_path="/System/Library/Fonts/Supplemental/Songti.ttc"font_path="/usr/share/fonts/truetype/windows-font/Songti.ttc"fnt=ImageFont.truetype(font_path,font_size)draw.text((margin_left,margin_top),text,fill=color,font=fnt)ifimg_pathisNone:img_path=Path(origin_img)img_path=img_path.with_name(f"{img_path.stem}-{len(text)}{img_path.suffix}")im.save(img_path)ifshow_img:im.show()returnimg_path#拼接图片，把上面生成的文字图片拼接到原图上面#生成一张宽度一致，高度为两张图片之和的空白长图#分别打开图片进行粘贴到空白长图里面defjoin_imgs(text_img,origin_img,new_path=None)->None:w=get_img_width(text_img)fh=get_img_height(text_img)oh=get_img_height(origin_img)blank_long_img=Image.new("RGBA",(w,fh+oh))#空白长图font_img=Image.open(text_img).resize((w,fh),Image.ANTIALIAS)blank_long_img.paste(font_img,(0,0))img1=Image.open(origin_img).resize((w,oh),Image.ANTIALIAS)blank_long_img.paste(img1,(0,fh))ifnew_pathisNone:new_path=origin_imgblank_long_img.save(new_path)blank_long_img.show()defdeco_image(fpath:Union[Path,str],#图片路径text:str=TIP,#要添加的文字new_path:Union[Path,str,None]=None,#新图片要保存的路径（默认覆盖原图）color:Union[str,Tuple[int,int,int]]=FONT_COLOR,#文字颜色font_size:int=FONT_SIZE,#文字高度margin_left:int=MARGIN_LEFT,margin_top:int=MARGIN_TOP,)->None:text_img=gen_text_img(fpath,text,color=color,font_size=font_size,margin_left=margin_left,margin_top=margin_top,)join_imgs(text_img,fpath)

3. 如果系统缺字体，那么需要去下载

sudomkdir/usr/share/fonts/truetype/windows-fontsudochmod777/usr/share/fonts/truetype/windows-fontcd/usr/share/fonts/truetype/windows-fontwgethttps://gitee.com/waketzheng/carstino/attach_files/703450/download/Songti.ttc#该文件比较大，有66.9MB

4. 调起支付或生成图片

frompathlibimportPathfromhashlibimportmd5importqrcode#pipinstallqrcodefromsanicimportBlueprintfromsanic.logimportloggerfromsanic.requestimportRequestfromsanic.responseimportjsonfrom.modelsimportOrderfrom.image_textimportdeco_imagefrom.toolboximportUserAgentfrom.utilsimportasync_http_post,get_hostfrom.constsimportURL_PREFIX,WX_PAY_URLbp=Blueprint("epay",url_prefix=URL_PREFIX)asyncdefget_qf_mch(community):pass@bp.route("/pay-link",methods=["POST"])asyncdefpay_link(request:Request):requires,data=["bills","total","next"],request.jsonlogger.info(f"{request.url=};{request.json=}")#已经1分钟内生成过对应订单的，直接去支付content=request.body+f"{datetime.now():%y%m%d%H%M%S}".encode()body=md5(content).hexdigest()ifnot(order:=awaitOrder.filter(body=body).first()):order=awaitnew_pay_order(origin,data,request,body)mchid,mch_name=awaitget_qf_mch(order.community)ifmchid:host=get_host(request.headers)ifnotUserAgent(request=request).is_wechat:#故判断当前是否在微信里，如果不是就直接生成二维码frontend_url=data["next"]fpath="payit/"+md5(frontend_url.encode()).hexdigest()+".png"ifnot(p:=BASE_DIR/"media"/fpath).parent.exists():p.parent.mkdir(parents=True)qrcode.make(frontend_url).save(p)deco_image(p)img_url=host+URL_PREFIX+"/media/"+fpathreturnjson({"payUrl":img_url})returnjson(qf_pay_it(mchid,mch_name,order,host=host))url=WX_PAY_URLifnot(request_data:=order.post_data).get("mch"):request_data.update(mch=1)#未配置支付的,先用1res=awaitasync_http_post(url,request_data)try:res_json=res.json()exceptExceptionase:logger.error(f"{e=};{url=};{order.post_data=};{res.content=}")returnjson(res_json)

感谢各位的阅读，以上就是“如何用Python给二维码图片添加提示文字”的内容了，经过本文的学习后，相信大家对如何用Python给二维码图片添加提示文字这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是亿速云，小编将为大家推送更多相关知识点的文章，欢迎关注！