我有一段我的代码,我应该创建一个交换机.我想返回所有开关的列表.这里"开"将等于True和"关"相等False.所以现在我只想返回所有True值及其位置的列表.这就是我所有但它只返回第一次出现的位置True(这只是我代码的一部分):
self.states = [False, False, False, False, True, True, False, True, False, False, False, False, False, False, False, False]
def which_switch(self):
x = [self.states.index(i) for i in self.states if i == True]
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这只返回"4"
我在亚马逊有一个 RDS 实例,我想修改分配的存储空间,它目前为 500GB,但我希望它为 50GB。但是,当我尝试在控制台中更改此设置时,我收到以下错误:Invalid storage size for engine name postgres and storage type standard: 60
我有一个没有与之关联的 RDS 实例的 Elasticbeanstalk 应用程序,在阅读之后我读到有些人需要一个与您尝试修改的 RDS 具有相同规格的实例,但是这也不起作用.
这里有什么帮助吗?
我已经尝试了一段时间让django Oauth工具包工作,但不管我得到401错误,当我检查细节时,它是标题中的错误.即使我显然传递凭证
views.py:
class PostCarFax(viewsets.ModelViewSet):
#authentication_classes = [authentication.TokenAuthentication, authentication.SessionAuthentication, authentication.BaseAuthentication]
permission_classes = [permissions.IsAuthenticated, TokenHasReadWriteScope]
queryset = CarFax.objects.all()
serializer_class = CarFaxSerializer
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serializers.py:
class CarFaxSerializer(serializers.ModelSerializer):
class Meta:
model = CarFax
fields = ('vin', 'structural_damage', 'total_loss',
'accident', 'airbags', 'odometer', 'recalls',
'last_updated', 'origin_country')
def create(self, validated_data):
return CarFax.objects.create(**validated_data)
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settings.py
import os
import django_heroku
from django.conf import settings
settings.configure()
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.11/howto/deployment/checklist/
# SECURITY …Run Code Online (Sandbox Code Playgroud) 我有一个 Excel 文件,日期的存储方式如下:
Saturday November 30, 2019
但是,当我将 Excel 文件读入数据帧时,日期将转换为以下格式:
Date Deer Lake Dartmouth Grand Falls
2019-11-30 0.7917 0.7663 0.7805
为什么会发生这种情况?pandas 是否可以选择阻止任何重新格式化?
我如何读取Excel文件:df = pd.read_excel("RunningTotals_test.xlsx", keep_default_na=False, sheet_name=sheet_name)
我已经使用官方文档向我的应用程序添加了 Django 消息。它说在我的模板中添加这样的东西:
{% if messages %}
<ul class="messages">
{% for message in messages %}
<li{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</li>
{% endfor %}
</ul>
{% endif %}
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我不知道百分比符号是做什么的,它们不是真正的 HTML,对吗?
只是尝试编写一个程序,将用户输入并将其添加到列表'数字':
print "Going to test my knowledge here"
print "Enter a number between 1 and 20:"
i = raw_input('>> ')
numbers = []
while 1 <= i <= 20 :
print "Ok adding %d to numbers set: " % i
numbers.append(i)
print "Okay the numbers set is now: " , numbers
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但是,当我执行程序时,它只运行到raw_input()
Going to test my knowledge here
Enter a number between 1 and 20:
>>> 4
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我在这里缺少一些基本规则吗?
我试图在while-loops条件语句中使用字典键,程序将不会将任何输入识别为"正确"
class Gymnast_room(KeyCode):
def enter(self):
print "This is the gymnastics room, we got foam pits and rings!"
print "Before you can enter, you have to enter the code"
guess = int(raw_input('What is the code? >>'))
passcodes = {'Gymnast_code': 1234,
'Powerlifting_code': 1234
}
while guess != passcodes['Gymnast_code']:
guess = int(raw_input('What is the code? >>'))
if guess == passcodes['Gymnast_code']:
print "Correct!"
return Powerlifting_room()
else:
print "Incorrect!"
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235Carling Robert 140 Simpson Ave Toronto Ont M6T9H1416/247-2538416/889-6178
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你看到每个角色的集合?我希望那些代表数据文件中的列.我遇到的问题是"街道地址"栏目.
for i in master_file:
#returns a list of the words, splitting at whitespace
columns = i.split()
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问题是虽然这会分成140 Simpson Ave三个"单词".是否有一种方法可以用来说只有单词如果被一定数量的空格或某些东西包围?
我想遍历一个文件并返回每一行:
for i in master_file:
columns = re.split('\s{2,}', i)
last_name = columns[1]
print(last_name)
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如果我更换print与return它只会返回columns[1]的第一线,但我想返回它的所有行.所以我可以在我的函数中的其他地方使用该信息.
我正在阅读这篇文章,试图了解有关排列的更多信息:在python中查找给定字符串的所有可能排列
我被困在这段代码上:
def permutations(string, step = 0):
# if we've gotten to the end, print the permutation
if step == len(string):
print "".join(string)
# everything to the right of step has not been swapped yet
for i in range(step, len(string)):
# copy the string (store as array)
string_copy = [character for character in string]
# swap the current index with the step
string_copy[step], string_copy[i] = string_copy[i], string_copy[step]
# recurse on the portion of the string that has not been …Run Code Online (Sandbox Code Playgroud) python ×9
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