我需要一个代表网址的用户名令牌username,就像这里一样=> https://twitter.com/username.
Twitter API文档尚不清楚.我无法区分:
screen_name =用户屏幕名称
name =用户全名
我是Django开发人员,最近我得到了一些项目,我需要将亚马逊的库存呈现给Django网站.是否存在某种允许Amazon.com共享其产品的解决方案,或者我必须使用scrapper管理它.非常感谢您的帮助.
我尝试用python3打开url:
import urllib.request
fp = urllib.request.urlopen("http://lebed.com/")
mybytes = fp.read()
mystr = mybytes.decode("utf8")
fp.close()
print(mystr)
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但它挂在第二行.这个问题是什么原因以及如何解决?
假设我有以下模型结构:
Parent():
Child():
parent = ForeignKey(Parent)
GrandChild():
child = ForeignKey(Child)
state = BooleanField()
num = FloatField()
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我正在尝试从 ParentViewSet恢复以下内容:
我可以执行以下操作:
queryset = Parent.objects\
.annotate(child_count=Count('child'))\
.annotate(sum_total=Sum('child__grandchild__num'))
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这给了我 (1) 但不是 (2) 它给了我所有孙子的总和。如何在确保所有Parent对象仍在 QuerySet 中的同时适当地过滤孙子?
django django-models django-queryset django-aggregation django-annotate
我想将一列浮点值转换为字符串,以下是我当前的方式:
userdf['phone_num'] = userdf['phone_num'].apply(lambda x: "{:.0f}".format(x) if x is not None else x)
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但是,它还会将 NaN 转换为字符串“nan”,当我检查此列中的缺失值时,这很糟糕,有更好的主意吗?
谢谢!
maxIterLogisticRegression from 中使用的参数的作用是什么pyspark.ml.classification?
mlor = LogisticRegression(maxIter=5, regParam=0.01, weightCol="weight",
family="multinomial")
Run Code Online (Sandbox Code Playgroud) 我想显示明天的日期.我正在使用通用ListView.
今天的日期很简单:
{% now "jS F Y H:i" %}
Run Code Online (Sandbox Code Playgroud) 请让我知道如何使用nodejs从s3检索图像?老实说,我可以通过以下方式将图像上传到s3,nodejs但问题是如何完成从s3检索图像的工作?
router.get('/image/:imageId', function (req, res, next) {
// ????
});
var s3 = new aws.S3({ accessKeyId: config.awsAccessId, secretAccessKey: config.awsAccessKey});
var upload = multer({
storage: multerS3({
s3: s3,
bucket: config.bucket,
key: function (req, file, cb) {
cb(null, file.originalname);
}
})
});
router.post('/upload/:id', upload.array('file', 3), function(req, res, next) {
res.send('Successfully uploaded ' + req.files.length + ' files!');
});
Run Code Online (Sandbox Code Playgroud) 我正在开发一个应用程序,我正在尝试根据标签显示相关帖子。我一切正常,但是当我在浏览器中加载详细信息视图时,我收到一条错误消息,说type object 'Post' has no attribute 'published'我已经在下面发布了我的代码。
模型:
class Post(models.Model):
"""docstring for Post."""
STATUS_CHOICES = (
('drafts', 'Draft'),
('published', 'Published'), )
user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1) #blank=True, null=True)#default=1
title = models.CharField(max_length = 120)
slug = models.SlugField(unique= True)
draft = models.BooleanField(default = False)
publish = models.DateField(auto_now=False, auto_now_add=False)
content = models.TextField()
tags = TaggableManager()
status = models.CharField(max_length=10,choices=STATUS_CHOICES, default='published')
updated = models.DateTimeField(auto_now=True, auto_now_add=False)
timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
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看法:
def view(request, slug =None):
instance = get_object_or_404(Post, slug =slug)
if instance.draft or instance.publish > …Run Code Online (Sandbox Code Playgroud) 我有一个包含外键的模型:
class Part(models.Model):
partType = models.ForeignKey(PartType, on_delete=models.CASCADE)
brand = models.ForeignKey(Brand, on_delete=models.CASCADE)
part_name = models.CharField(max_length=60)
class QuotePart(models.Model):
quote = models.ForeignKey(Quote, on_delete=models.CASCADE)
line = models.PositiveSmallIntegerField(default=1)
partType = models.ForeignKey(PartType, on_delete=models.CASCADE)
# part can be None if the part has not been selected
part = models.ForeignKey(Part, on_delete=models.CASCADE,blank=True,null=True)
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我有一个表单,允许将零件添加到报价中,并希望将表单上的选择限制为正确的零件类型,但我的代码不起作用:
class QuoteBikePartForm(ModelForm):
def __init__(self, *args, **kwargs):
super(QuoteBikePartForm, self).__init__(*args, **kwargs)
self.fields['partType'].widget.attrs['disabled'] = True
self.fields['frame_part'].widget.attrs['disabled'] = True
partType = kwargs.pop('partType')
self.fields['part'].queryset = Part.objects.filter(partType=partType.pk)
class Meta:
model = QuotePart
fields = ['quote','line','partType','frame_part', 'part', 'quantity','cost_price', 'sell_price']
QuoteBikePartFormSet = inlineformset_factory(Quote, QuotePart, …Run Code Online (Sandbox Code Playgroud)