python - Python / Jython：如果字符串中的子字符串总是导致TypeError：字符串成员测试需要char左操作数

Question

我有一个看起来像这样的列表：

wsadmin>print jvmLines
['', 'Stats name=jvmRuntimeModule, type=jvmRuntimeModule#', '{', 'name=HeapSize, ID=1, description=The total memory (in KBytes) in the Java virtual machine run time., unit=KILOBYTE, type=BoundedRangeStatistic, lowWaterMark=1048576, highWaterMark=1048576, current=1048576, integral=0.0, lowerBound=1048576, upperBound=2097152', '', 'name=FreeMemory, ID=2, description=The free memory (in KBytes) in the Java virtual machine run time., unit=KILOBYTE, type=CountStatistic, count=176789', '', 'name=UsedMemory, ID=3, description=The amount of used memory (in KBytes) in the Java virtual machine run time., unit=KILOBYTE, type=CountStatistic, count=871786', '', 'name=UpTime, ID=4, description=The amount of time (in seconds) that the Java virtual machine has been running., unit=SECOND, type=CountStatistic, count=3809648', '', 'name=ProcessCpuUsage, ID=5, description=The CPU Usage (in percent) of the Java virtual machine., unit=N/A, type=CountStatistic, count=1', '}']

为什么会这样：

for line in jvmLines:
    if "name=" in line:
        print line

导致这个？

TypeError: string member test needs char left operand

如果我尝试 lambda 函数或 filter()，我也会得到相同的结果

Answer 1

试试find()方法

for line in jvmLines:
    if line.find('name=') >= 0:
        print line

Answer 2

我收到此消息是因为我返回的是单个值而不是数组。IE

# Causes Error
# serverList = {'default': 'server001'}
if s in serverList[‘default’]

# Works Fine
# serverList = {'default': ('server001', 'server002')} 
if s in serverList[‘default’]

当返回的值是我预期的列表时，它可以正常工作，但如果它是单个值，则“in”会引发错误。