reduce函数在python3的内建函数移除了,放入了functools模块 参考: NameError: global name ‘reduce’ is not defined 连接: https://stackoverflow.com/questions/10226381/nameerror-global-name-reduce-is-not-defined
简介: Python编程:NameError: name 'reduce' is not defined 问题来了 使用reduce() 测试的时候报错:reduce 未定义! print(reduce(lambda x, y: x + y, [ 1, 2, 3])) """Output: NameError: name 'reduce' is not defined """ 解决 引用stackoverflow的回答: - 你使用的是python3 - 参考的是...
--->1reduce(lambdax, y: x+y, [1,2,3,4,5]) NameError: name'reduce'isnotdefined 原来自 Python3 之后,这个函数从全局命名空间中移除,放在了functools模块,因为如果想正确执行,必须这样 In [2]:fromfunctoolsimportreduce In [3]: reduce(lambdax, y: x+y, [1,2,3,4,5]) Out[3]:15 参考...
NameError: name 'reduce' is not defined 听说了大名鼎鼎的 reduce 函数,可以是执行的时候却显示这个。 In [1]: reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) --- NameError Traceback (most recent call last) <ipython-input-1-4c41a726eae1> in <module>() ---> 1 red...
问题现象: 执行MaxCompute MapReduce时,返回报错如下。 Exception in thread "main" com.aliyun.odps.OdpsException: Table not found: project_name.table_name. 产生原因 目标项目不正确或目标表不存在。 解决措施 MapReduce接口的Table Info Builder是
And what’s cool is that though the pipeline is sequential and will not move to the next step until the previous step has completed, each step can still be executed asynchronously. This allows the pipeline to continue to receive and process new MapReduce requests even while the pipeline is ...
Note that nothing has actually been done yet, and the log file has not been read. The only thing that has happened is that an expression has been evaluated. By doing this, execution is delayed until it’s actually needed, without pulling data into memory just for the sake of evaluating ...
openssl: relocation error: openssl: symbol BIO_new_dgram_sctp version OPENSSL_1_1_0 not defined in file libcrypto.so.1.1 with link time referencecreate server private key failed. Cause Analysis OpenSSL may have been changed and is not the default/usr/bin/openssl. ...
When Database Engine adds rows to a page during index creation, rebuild, or reorganization, it will not fill the page fully if thefill factorfor the index is set to a value other than 100 (or 0, which is equivalent in this context). This causes lower page density, and similarly adds ...
When a MapReduce job is run in MaxCompute, the following error message appears: Exceptioninthread"main"java.io.IOException: com.aliyun.odps.OdpsException: ODPS-0420095:AccessDenied - Thetaskisnotinreleaserange: LOT Cause Only PyODPS jobs and MaxCompute SQL jobs in which user-defined functions ...