Web3.eth：溢出错误：Python int 太大而无法转换为 C ssize_t

Posted 2023-02-18

【中文标题】Web3.eth：溢出错误：Python int 太大而无法转换为 C ssize_t

【英文标题】：Web3.eth: OverflowError: Python int too large to convert to C ssize_t

【发布时间】：2021-01-22 14:27:43

【问题描述】：

我正在尝试获取各种代币合约的符号，但其中一些我收到以下错误：

OverflowError: Python int 太大，无法转换为 C ssize_t

这是一个最小的可重现示例：

from web3 import Web3
import json

web3 = Web3(Web3.HTTPProvider('https://cloudflare-eth.com'))

address = '0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2'

abi = json.loads(
        '["constant":true,"inputs":[],"name":"name","outputs":["name":"","type":"string"],"payable":false,"stateMutability":"view","type":"function","constant":false,"inputs":["name":"_spender","type":"address","name":"_value","type":"uint256"],"name":"approve","outputs":["name":"","type":"bool"],"payable":false,"stateMutability":"nonpayable","type":"function","constant":true,"inputs":[],"name":"totalSupply","outputs":["name":"","type":"uint256"],"payable":false,"stateMutability":"view","type":"function","constant":false,"inputs":["name":"_from","type":"address","name":"_to","type":"address","name":"_value","type":"uint256"],"name":"transferFrom","outputs":["name":"","type":"bool"],"payable":false,"stateMutability":"nonpayable","type":"function","constant":true,"inputs":[],"name":"decimals","outputs":["name":"","type":"uint8"],"payable":false,"stateMutability":"view","type":"function","constant":true,"inputs":["name":"_owner","type":"address"],"name":"balanceOf","outputs":["name":"","type":"uint256"],"payable":false,"stateMutability":"view","type":"function","constant":true,"inputs":[],"name":"symbol","outputs":["name":"","type":"string"],"payable":false,"stateMutability":"view","type":"function","constant":false,"inputs":["name":"_to","type":"address","name":"_value","type":"uint256"],"name":"transfer","outputs":["name":"","type":"bool"],"payable":false,"stateMutability":"nonpayable","type":"function","constant":true,"inputs":["name":"_owner","type":"address","name":"_spender","type":"address"],"name":"allowance","outputs":["name":"","type":"uint256"],"payable":false,"stateMutability":"view","type":"function","anonymous":false,"inputs":["indexed":true,"name":"_from","type":"address","indexed":true,"name":"_to","type":"address","indexed":false,"name":"_value","type":"uint256"],"name":"Transfer","type":"event","anonymous":false,"inputs":["indexed":true,"name":"_owner","type":"address","indexed":true,"name":"_spender","type":"address","indexed":false,"name":"_value","type":"uint256"],"name":"Approval","type":"event"]')  # noqa: 501


symbol = web3.eth.contract(address=address, abi=abi).functions.symbol().call()

我不知道为什么会出现此错误，尤其是考虑到它适用于某些合同但不适用于其他合同。任何帮助将不胜感激！

【问题讨论】：

见“OverflowError: Python int too large to convert to C long” on windows but not

@ShivamJha 我有点不清楚我的代码中可以从 int 切换到 float 的位置，以及为什么它目前适用于某些合同而不适用于其他合同。

【参考方案1】：

此特定标记将符号返回为 bytes32，因此更改符号函数的类型解决了问题。

【讨论】：

并将字节解码为字符串：name = t.name().decode('utf-8') symbol = t.symbol().decode('utf-8')