Missing solc installation

[AlbertoSinigaglia]

During the first compilation (around 3:45:00), you are not showing that is required to install the solc package to effectively compile the Solidity contract.

I've solved with:

import solcx
solcx.install_solc('0.8.7') # or whatever version we want

[oceanKingEth]

thank you Alberto! I got stuck here as well. this worked perfectly. I added in version ('0.6.0') to match the tutorial and it worked as well.

[cromewar]

Hello @Aussiecpto2 could you please provide more info about what you tried and may be screenshots about the errors you have?

[jt-berg-whitt]

not a single answer in the 5 different threads opened about this issue are working answers

[mr-ziash]

i found this solution the pip version (you type pip --version) in the terminal should be the same as the python version (python --version) and the python version in the bottom left corner, but I'm still getting that INFO: could not find files for the gives pattern(s), is that okay? also I don't see that bunch of code that was shown in the video I just get that info thingy

[cromewar]

@mr-ziash, this INFO: could not find files for the gives pattern(s) is not an error, so you have nothing to worry about ;)

[Rohann608]

I've tried the command that you suggested and it still throws an error. I've already installed the solcx using the command pip install py-solc-x and when I'm running the code it seems like vscode is not recognizing solcx import.

it gives out the error:
NameError: name 'compile_standard' is not defined
PS C:\Users\hp\web3_py_simple_storage> python -u "c:\Users\hp\web3_py_simple_storage\deploy.py"
INFO: Could not find files for the given pattern(s).
Traceback (most recent call last):
File "c:\Users\hp\web3_py_simple_storage\deploy.py", line 8, in
compiled_sol = compile_standard(
NameError: name 'compile_standard' is not defined
PS C:\Users\hp\web3_py_simple_storage>

the code that I'm running:
`import solcx

solcx.install_solc("0.6.0")

with open("./SimpleStorage.sol", "r") as file:
simple_storage_file = file.read()

compiled_sol = compile_standard(
{
"language": "Solidity",
"sources": {"SimpleStorage.sol": {"content": simple_storage_file}},
"settings": {
"outputSelection": {
"": {
"": ["abi", "metadata", "evm.bytecode", "evm.bytecode.sourceMap"]
}
}
},
},
)
print(compiled_sol)
`

[PatrickAlphaC]

Thanks so much!!

I've added this to our issue tracker, and updated our code examples: https://github.com/smartcontractkit/full-blockchain-solidity-course-py/blob/main/chronological-issues-from-video.md#lesson-4

Thank you so much!

[jt-berg-whitt]

Still doesnt work:
`from solcx import compile_standard, install_solc

install_solc("0.6.0")

with open("./SimpleStorage.sol", "r") as file:
simple_storage_file = file.read()
print(simple_storage_file)

Compile our Solidity

compiled_sol = compile_standard(
{
"language": "solidity",
"sources": {"SimpleStorage.sol": {"content": simple_storage_file}},
"settings": {
"outputSelection": {
"": {"": ["abi", "metadata", "evm.bytecode", "evm.sourceMap"]}
}
},
},
solc_version="0.6.0",
)

print(compiled_sol)
`

[jt-berg-whitt]

I've also highlighted all the code and shift+enter seems to make it run the code? Here's the printout:

`>>> from solcx import compile_standard, install_solc

install_solc("0.6.0")
Version('0.6.0')
print("Hopfully installing, but probably not...")
Hopfully installing, but probably not...
with open("./SimpleStorage.sol", "r") as file:
... simple_storage_file = file.read()
... print(simple_storage_file)

...
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;

contract SimpleStorage {
// this initializes to 0 and internal
uint256 favoriteNumber;

struct People {
    uint256 favoriteNumber;
    string name;
}

People[] public people;
mapping(string => uint256) public nameToFavoriteNumber;

function store(uint256 _favoriteNumber) public {
    favoriteNumber = _favoriteNumber;
}

function retrieve() public view returns (uint256) {
    return favoriteNumber;
}

function addPerson(string memory _name, uint256 _favoriteNumber) public {
    people.push(People(_favoriteNumber, _name));
    nameToFavoriteNumber[_name] = _favoriteNumber;
}

}

compiled_sol = compile_standard(
... {
... "language": "solidity",
... "sources": {"SimpleStorage.sol": {"content": simple_storage_file}},
... "settings": {
... "outputSelection": {
... "": {"": ["abi", "metadata", "evm.bytecode", "evm.sourceMap"]}
... }
... },
... },
... solc_version="0.6.0",
... )
Traceback (most recent call last):
File "", line 1, in
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/solcx/main.py", line 394, in compile_standard
raise SolcError(
solcx.exceptions.SolcError: Only "Solidity" or "Yul" is supported as a language.
command: /Users/jacobwhitt/.solcx/solc-v0.6.0 --standard-json
return code: 0
stdout:
{"errors":[{"component":"general","formattedMessage":"Only "Solidity" or "Yul" is supported as a language.","message":"Only "Solidity" or "Yul" is supported as a language.","severity":"error","type":"JSONError"}]}

stderr:

print(compiled_sol)
Traceback (most recent call last):
File "", line 1, in
NameError: name 'compiled_sol' is not defined
`

[jt-berg-whitt]

Still it seems that I am getting the same error about language supported, but i wrote solidity in lower case as I saw other people answering to do.
I also have this error "compiled_sol isn't defined" even though it def is...
all this on top of the console showing me this:
python --version // Python 2.7.16 < this seems to be the base version in my Mac OS, even though I chose 3.10 which I just installed...I even chose multiple versions of Python in the bottom left corner of VSCode to no avail

[ElyWacime]

i keep getting this error :
raise ValueError('Invalid version string: %r' % version_string)
ValueError: Invalid version string: "solcx.install_solc('0.6.0')"

any idea how to solve this problem?
i asked chatGPT, and it says that i should run this commands:

sudo apt-get install software-properties-common
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 9BA28146F7AD7FC9
sudo add-apt-repository "deb http://ppa.launchpad.net/ethereum/ethereum/ubuntu xenial main"

but after doing that i get this error:
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 126, in lpppa
self._lpppa = self.lpteam.getPPAByName(name=self.ppaname)
^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 113, in lpteam
self._lpteam = self.lp.people(self.teamname)
^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'people'

[cromewar]

@ElyWacime I will recommend you to use an isolated python environment, and also check out your code as it seems you are referring to people when it's not able to find it.

[pinkCosmos]

Thank you for bringing up the problem, but I still get

bash: syntax error near unexpected token `'0.6.0''

when i try to install the package..
With npm install -g solc and a rooted shell I was then able to successfully install it. But I am still not able to run the code, because i get the following error message every time I try:

File "deploy.py", line 1, in
from solcx import compile_standard
ImportError: No module named solcx

Any Ideas what the Problem could be?

[cromewar]

@AlfonsoJohn are you selecting the proper python interpreter on vscode, on the bottom left corner you can select it.

[AlfonsoJohn]

@cromewar Not sure, which one do you recommend? These are the ones that show up for me.

[cromewar]

You must select the one you have installed web3, solc and brownie if I have to guess it would be the the 3.10 version, but I don't know give it a try.

[SubratSahai]

its still not working after changing the interepreter too

[SubratSahai]

its not showing error but it still says solcx is not recogonised

[Bawera17]

Hello I have this error.
solc_version="0.6.0",
^
SyntaxError: invalid syntax

My code is this:

from solcx import compile_standard, install_solc

with open("./SimpleStorage.sol", "r") as file:
    simple_storage_file = file.read()
    print(simple_storage_file)

install_solc("0.6.0")
compiled_sol = compile_standard(
    {
    "language": "Solidity", 
    "sources": {"SimpleStorage.sol": {"content": simple_storage_file}},
    "settings": {
        "outputSelection": {
            "*" : {"*": ["abi", "metadata", "evm.bitecode", "evm.sourceMap"]}
            }
        }
    }
    solc_version="0.6.0",
)

print(compiled_sol)

Thanks in advance.

[Anu-srinivasan]

Hi all,
my code is
from solcx import compile_standard, install_solc # <- import the install_solc method!

print ("installing...")

install_solc("0.6.0") # <- Add this line and run it at least once!
with open("./SimpleStorage.sol", "r") as file:
simple_storage_file = file.read()
compiled_sol = compile_standard(
{
"language": "solidity",
"sources": {"SimpleStorage.sol": {"content": simple_storage_file}},
"settings": {
"outputSelection": {
"": {"": ["abi", "metadata", "evm.bytecode", "evm.sourceMap"]}
}
},
},
solc_version="0.6.0",
)

Error is
C:\Users\RBI\demos\simple_storage>python deploy.py
INFO: Could not find files for the given pattern(s).
installing...
Traceback (most recent call last):
File "C:\Users\demos\simple_storage\deploy.py", line 10, in
compiled_sol = compile_standard(
File "C:\Python39\lib\site-packages\solcx\main.py", line 394, in compile_standard
raise SolcError(
solcx.exceptions.SolcError: Only "Solidity" or "Yul" is supported as a language.

command: C:\Users\.solcx\solc-v0.6.0\solc.exe --standard-json
return code: 0
stdout:
{"errors":[{"component":"general","formattedMessage":"Only "Solidity" or "Yul" is
supported as a language.","message":"Only "Solidity" or "Yul" is supported as a language.","severity":"error","type":"JSONError"}]}

stderr:

Kindly let me where I have gone wrong and what needs to be done by me please

[AlbertoSinigaglia]

Most pf the times the error tells you everything, in this case _ Only "Solidity" or "Yul" is supported as a language_.
Infact as you can see from here https://github.com/PatrickAlphaC/web3_py_simple_storage/blob/main/deploy.py you have to use "language": "Solidity", instead of "language": "solidity", @Anu-srinivasan

[jt-berg-whitt]

changed Solidity and still have issues. but if hitting "SHIFT + ENTER" - the code runs as in the tutorial video, but if i leave that terminal shell back to my main zsh shell, and type "python deploy.py" i get the "solcx module not found/installed" errors still... what gives?

[cromewar]

@jwhitty1 don't forget to select the correct python interpreter on vscode (bottom left corner) you should choose the one you have installed solc in, and of course open a new terminal.

[J-jacobz7531]

I also had the same issue but fixed it by changing the Compile version in settings if you had not done so
Go to Settings (Ctrl+,)
Then type 'Solidity' and edit in settings.json the Compile Using Remote Version
to
"solidity.compileUsingRemoteVersion": "0.6.0",

[claxtonh]

I put in the fixes as suggested (from solcx import compile_standard, install_solc) and (install_solc("0.6.0").
The code appears to run correctly, EXCEPT in my terminal window I have 1 Problems. When I click to view the problem it says,
"Unable to import 'solcx' pylint(import-error) [1,1]"

It still seems to run correctly, and I'm willing to just ignore it and continue on, though I'm a little worried it will cause issues down the road. My code is below, in case you see something of concern.

`from solcx import compile_standard, install_solc


with open("./SimpleStorage.sol", "r") as file:
    simple_storage_file = file.read()
    print(simple_storage_file)

#compile Solidity

install_solc("0.6.0")
compiled_sol = compile_standard(
    {
        "language": "Solidity",
        "sources": {
            "SimpleStorage.sol": {
                "content": simple_storage_file
            }
        },
        "settings": {
            "outputSelection": 
            {
                "*" : {
                    "*": [
                        "abi", "metadata", "evm.bytecode", "evm.sourceMap"
                    ]
                }
            }
        }
    },
    solc_version = "0.6.0"
)

print(compiled_sol)`

[cromewar]

hi @claxtonh yo can refer to this video.

[claxtonh]

Awesome, that worked! Thank you

[cromewar]

I'm glad is solved now.

[ghost]

First of all thank you cromewar, It solved my importing problem thanks.
I changed the interpreter to (windows store python) & it fixed it - I just picked the python with the windows store local file. hope it won't be an issue to what is coming nect in the course :)

[kingsingh21]

from solcx import compile_standard, install_solc

with open("./SimpleStorage.sol", "r") as file:
    simple_storage_file = file.read()
    print(simple_storage_file)

#compile Solidity

install_solc("0.6.0")
compiled_sol = compile_standard(
    {
        "language": "solidity",
        "sources": {
            "SimpleStorage.sol": {
                "content": simple_storage_file
            }
        },
        "settings": {
            "outputSelection": 
            {
                "*" : {
                    "*": [
                        "abi", "metadata", "evm.bytecode", "evm.sourceMap"
                    ]
                }
            }
        }
    },
    solc_version = "0.6.0"
)

print(compiled_sol)

========
Getting below error.

Traceback (most recent call last):
File "C:\Users\User\demos\web3_py_simple_storage\deploy.py", line 13, in
compiled_sol = compile_standard(
File "C:\Users\User\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\solcx\main.py", line 373, in compile_standard
stdoutdata, stderrdata, command, proc = wrapper.solc_wrapper(
File "C:\Users\User\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\solcx\wrapper.py", line 98, in solc_wrapper
solc_version = _get_solc_version(solc_binary)
File "C:\Users\User\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\solcx\wrapper.py", line 17, in _get_solc_version
stdout_data = subprocess.check_output([str(solc_binary), "--version"], encoding="utf8")
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2544.0_x64__qbz5n2kfra8p0\lib\subprocess.py", line 424, in check_output
return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2544.0_x64__qbz5n2kfra8p0\lib\subprocess.py", line 528, in run
raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['C:\Users\User\.solcx\solc-v0.6.0\solc.exe', '--version']' returned non-zero exit status 3221225595

please help.

[cromewar]

hello @kingsingh21 Solidity must be upper case.

[kingsingh21]

I am getting the same error even after changing "solidity" to "Solidity".

I just ran below code to see any issue

from solcx import compile_standard, install_solc

Getting below error
INFO: Could not find files for the given pattern(s).

[cromewar]

About INFO: Could not find files for the given pattern(s).is not an error so you don't have to worry about.

regarding to the problem above I recommend one of this options.

1. install a different solcx version.
2. use WSL.

[widmung89]

[cromewar]

Hello @widmung89 you have setting and the correct keyword is settings, that's why it isn't working.
Give it a try ;)

[widmung89]

oh yes I saw that, that's why I remove my post! Thanks @cromewar !

[ashish060316]

During the first compilation (around 3:45:00), you are not showing that is required to install the solc package to effectively compile the Solidity contract.

I've solved with:

import solcx
solcx.install_solc('0.8.7') # or whatever version we want

Resolved the issue thanks

[cromewar]

Well it seems you installation is unable to locate solcx, there are some things you could try.

1. use a python virtualenv, this allows you to manage all the libraries separately.
2. Do not forget to install py-solc-x.
3. if you are on windows try using WSL.

[selinimsibiri]

thank you so much ill try them now

[ashish060316]

import solcx
solcx.install_solc("0.8.7")
from solcx import compile_standard

try this. I am using mac and it worked.

[selinimsibiri]

i pasted this to my terminal :

python3 -m venv env
source env/bin/activate
pip3 install py-solc-x
pip3 install py-solc

it created a virtual enviroment and it worked . I hope it works for you too.

[AlrohfAZ]

THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[oliveruf42]

from solcx import compile_standard, install_solc  # <- Import the install_solc method!
install_solc("0.6.0")

with open("SimpleStorage.sol", "r") as file:
    simple_storage_file = file.read()

compiled_sol = compile_standard(
    {
        "language": "Solidity",
        "sources": {"ScleaimpleStorage.sol": {"content": simple_storage_file}},
        "settings": {
            "outputSelection": {
                "*": {"*": ["abi", "metadata", "evm.bytecode", "evm.sourceMap"]}
            }
        },
    },
    solc_version="0.6.0",
)
print("compiled_sol")

The default interactive shell is now zsh.
To update your account to use zsh, please run chsh -s /bin/zsh.
For more details, please visit https://support.apple.com/kb/HT208050.
Eddies-iMac:web3_py_simple_storage eddiebraddock$ python deploy.py
Traceback (most recent call last):
File "deploy.py", line 1, in
from solcx import compile_standard, install_solc # <- Import the install_solc method!
ImportError: No module named solcx
Eddies-iMac:web3_py_simple_storage eddiebraddock$ python3 deploy.py
compiled_sol
Eddies-iMac:web3_py_simple_storage eddiebraddock$

[cromewar]

are you selecting the correct python interpreter on vscode (bottom left corner)?

[oliveruf42]

When i pull up the Python Interpreter in VS Code it gives me 3 options

Python 3.10.1 64 bit /usr/local/bin/python3

Python 3.8.9 64 bit /usr/bin/python3

Python 3.10.1 64 bit ('env': venv) ./env/bin/python

The last one is from the virtual enviroment i setup as suggested on Stack Overflow. I've tried all three with no luck. Is there one i should try to add? (Thank you for helping me)

[oliveruf42]

It's not throwing Errors anymore, but now it's like the interpreter is ignoring all the code above print("compiled_sol") . So when i type in python3 deploy.py or python deploy.py it simply prints $compiled_sol

[oliveruf42]

Nevermind it works now! I think i had something mucked up with the deploy.py file so i went back and started from scratch with a fresh file. I setup a fresh virtual env and it finally worked! Thank you so much for helping :)

[cromewar]

I'm glad is solved now ;)

[caspixn]

Having a similar sort of problem. But I'm receiving....

Traceback (most recent call last):
File "C:\Users\Will\Demos\web3_py_simple_storage\deploy.py", line 8, in
compiled_sol = compile_standard(
File "C:\Users\Will\AppData\Local\Programs\Python\Python310\lib\site-packages\solcx\main.py", line 365, in compile_standard
raise ContractsNotFound(
solcx.exceptions.ContractsNotFound: Input JSON does not contain any sources

command: ``
return code: None
stdout:
None
stderr:
None

[cromewar]

python 3.10 has problems with web3, use python 3.8 instead.

[mycrowprojects]

How the hell do you get off this list? (Email notifications for every comment made) omg. I’ve unsubscribed 3? x’s Sent from an Apple  Device

…

On Feb 6, 2022, at 8:27 PM, caspixn ***@***.***> wrote:  Having a similar sort of problem. But I'm receiving.... Traceback (most recent call last): File "C:\Users\Will\Demos\web3_py_simple_storage\deploy.py", line 8, in compiled_sol = compile_standard( File "C:\Users\Will\AppData\Local\Programs\Python\Python310\lib\site-packages\solcx\main.py", line 365, in compile_standard raise ContractsNotFound( solcx.exceptions.ContractsNotFound: Input JSON does not contain any sources command: `` return code: None stdout: None stderr: None — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you are subscribed to this thread.

[cromewar]

Go to your github settings and remove the notifications from new content.

[mycrowprojects]

Right. I did that. But still woke up to 2 dozen emails. See attachment. Something is broken. Mike :: MIKECHESSER-RØE ***@***.*** 509-310-9445 “I never more than half succeed in expressing what I want to express. Actually not as much as that, but by no more than a tenth. That is still worth something. Often my writing is nothing but ‘stuttering.’” –Wittgenstein, Culture and Value, p. 18e Sent from an Apple  Device

…

On Feb 7, 2022, at 8:48 AM, Vasiliy Gualoto ***@***.***> wrote:  Go to your github settings and remove the notifications from new content. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you commented.

[maorazoulay]

Guys, only thing that worked for me was pretty simple:

if you are on windows, just hold ctrl + shift + P and search for "python interpreter", then select the one that is recommended in the dropdown, that's it.

[kamal3951]

Hey, 3:44:00 I'm getting this error, It says solcx would not be resolves but I've tried installing the solcx by pip install py-solc-x

[cromewar]

@kamal3951 be sure you have selected the correct python interpreter on vscode.