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I am a beginner and need help with converting str to float on python.
the code seems to work fine locally, but when I deploy on heroku I get
"ValueError: could not convert string to float".
Is anybody else experiencing this? It would be great if you could help me.
2022-01-26T14:40:03.536858+00:00 app[web.1]:
tx_count = float(raw_data["result"].replace("0x", ""))
2022-01-26T14:40:03.536858+00:00 app[web.1]:
#ValueError: could not convert string to float: 'Invalid API Key'
my code:
my_address = request.form["public_key"]
response = requests.get(f"https://api.etherscan.io/api?module=proxy&action=eth_getTransactionCount&address={my_address}&tag=latest&apikey={API_KEY}")
raw_data = response.json()
raw_data:
raw_data = {
'jsonrpc': '2.0',
'id': 1,
'result': '0x3'
}
I want raw_data["result"] to be a number because I want to use the number to calculate.
I created a repository on github
https://github.com/yataishiba/co2-calc-eth
UPDATE
I tried this but it is still not working...
Convert hex string to int in Python
You can't throw hex directly at float() because the string can contain non-numerical strings; i.e. A-F.
Instead you should use float.fromhex(). This will also let you not use .replace(). For example:
tx_count = float.fromhex(raw_data["result"])
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Error message:
alarm = f"{alarm_hour}:{alarm_minute:02}:{alarm_am_pm}"
ValueError: '=' alignment not allowed in string format specifier
I don't know why this code is giving the error as I have used the same before in the 's program and it's working fine. Here's the code.
TIME = f"{current_hour}:{current_minute:02}:{current_second} {am_pm}"
But whenever I remove :02 from alarm_minute it works as I wanted to show number in 2 digits. I'm confused what's wrong with the code. Both are almost identical but one is giving error other's don't.
Assuming you want to have the number formated as a two digit with leading 0 when its a single digit you can pass this with the letter d to let the fstring know you want to format as 2 digits leaded by 0. you can do similar with floats to print to x many decimal places.
num = 3
price = 4.9
print(f"{num:02d}, {price:.2f}")
OUTPUT
03, 4.90
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I try to convert a list of Chinese province into pinyin use pinyin package, code like below:
df['province'] = df['comb_province'].apply(lambda x: pinyin.get(x, format="strip", delimiter=''))
but I got an error says: 'float' object is not iterable. Why this happens? How can I fix it?
Thank you!
You may have been encountered numpy.nan or None values in the df["comb_province"] column. So, you could try to remove those rows with numpy.nan by using the following code:
df = df[~df["comb_province"].isnull()]
or if you wish to keep the rows with numpy.nan or None, then using the following:
df["comb_province"] = df["comb_province"].astype(str)
Your original code may be of strip or split, something related to string operations, which will throw an error when encountering either numpy.nan or None.
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I have looked and can't find anything to answer my question.
I am using sample() function for random numbers, but it returns a list.
I have found an easy way to convert it into a string, but the int() function IS NOT working to turn it into an integer. How can I fix this? Is there a way I can skip out converting to a string?
Below is the code I am using:
from random import sample
def ver1():
qval = sample(range(1, 6),1)
#This converts qval from a list to a string:
qval_str = ''.join(map(str, qval))
#This converts qval from a string to an integer
int(qval_str)
print(qval_str)
ver1()
Thanks in advance,
hxhu
You are not saving the result of int() anywhere:
from random import sample
def ver1():
qval = sample(range(1, 6),1)
# This converts qval from a list to a string:
qval_str = ''.join(map(str, qval))
# this creates an integer from qval
ival=int(qval_str)
print(qval_str)
print(ival)
ver1()
int() returns the parsed integer as its return value - you need to save it in a variable to use it in the future
If you want a single value (as in your example usage of random.sample()), just use random.choice() instead.
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I have this JSON
myJson = [{"linkId":"changeDriveLink","url":"/drive/rayon.header.changedrivelink?t:ac=3686962/3696434","zoneId":"forceAjax"},
{"linkId":"affichePopinProduit","url":"/drive/rayon.header.promosmenu.thumbnailproduct.affichepopinproduit/804106/Paysan$0020Breton$0020beurre$0020moul$00e9$0020demi-sel$0020250g/$N?t:ac=3686962/3696434","zoneId":"forceAjax"},
{"linkId":"addProductToShoppingList2","url":"/drive/rayon.header.promosmenu.thumbnailproduct.addproducttoshoppinglist2/804106/Paysan$0020Breton$0020beurre$0020moul$00e9$0020demi-sel$0020250g?t:ac=3686962/3696434","zoneId":"forceAjax"}]
i want to have the URLS, i tried :
decoded = json.loads(myJson.read())
and
decoded = json.load(myJson.read())
and
decoded = json.load(myJson)
but I always have this error:
AttributeError: 'str' object has no attribute 'read'
How about:
decoded = json.loads(myJson)
which doesn't give any errors when I run it.
You don't need read(), just dump it (if you don't have it in string representation) and then load it.
import json
myJson = [{"linkId":"changeDriveLink","url":"/drive/rayon.header.changedrivelink?t:ac=3686962/3696434","zoneId":"forceAjax"},{"linkId":"affichePopinProduit","url":"/drive/rayon.header.promosmenu.thumbnailproduct.affichepopinproduit/804106/Paysan$0020Breton$0020beurre$0020moul$00e9$0020demi-sel$0020250g/$N?t:ac=3686962/3696434","zoneId":"forceAjax"},{"linkId":"addProductToShoppingList2","url":"/drive/rayon.header.promosmenu.thumbnailproduct.addproducttoshoppinglist2/804106/Paysan$0020Breton$0020beurre$0020moul$00e9$0020demi-sel$0020250g?t:ac=3686962/3696434","zoneId":"forceAjax"}]
myJson = json.dumps(myJson)
json.loads(myJson)
The result is a list of dicts:
[{'linkId': 'changeDriveLink',
'url': '/drive/rayon.header.changedrivelink?t:ac=3686962/3696434',
'zoneId': 'forceAjax'},
{'linkId': 'affichePopinProduit',
'url': '/drive/rayon.header.promosmenu.thumbnailproduct.affichepopinproduit/804106/Paysan$0020Breton$0020beurre$0020moul$00e9$0020demi-sel$0020250g/$N?t:ac=3686962/3696434',
'zoneId': 'forceAjax'},
{'linkId': 'addProductToShoppingList2',
'url': '/drive/rayon.header.promosmenu.thumbnailproduct.addproducttoshoppinglist2/804106/Paysan$0020Breton$0020beurre$0020moul$00e9$0020demi-sel$0020250g?t:ac=3686962/3696434',
'zoneId': 'forceAjax'}]
here is no need to 'loads' or 'dumps'. you are have already proper list-dict data.
for 'url's just use
[i['url'] for i in myJson]
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I am importing currency exchange rates from a website. All is well, except python prints the required data as follows:
['12.3098']
which means I can't use the data that I scraped in any calculations in my program. How do I get rid of the square brackets so that I can convert the string inside the square brackets to a float?
you have a list which is not a string... so if you want to get that value out select it like so
float(result[0])
replace 'result' with whatever your object is, aka what you printed ['12.3098']
try printing the type of your object type(result) and if its a list then this will fix your problem
if the type is a string you can do a literal evaluation of it like this
import ast
result = ast.literal_eval(result)
print result[0]