如何将列表中每个单词的第一个字母从大写转换为小写？

Question

如何将下面每个字母的第一个字母从大写转换为小写？你知道吗

例如SentMessage会变成sentMessage，NotAttemptedCreditLimitReached会变成notAttemptedCreditLimitReached。。。等等

下面的单词列表。它们只是在一个文本文件中。你知道吗

SentMessage
DeliverySucceeded
DeliveryFailed
DeliveryTimedOut
NotAttemptedCreditLimitReached
NotAttemptedChargingFailure
SubscriptionFailed
SentReportSMDeliveryStatus
FailedToSendReportSMDeliveryStatus
ReportSMSucceeded
ReportSMFailed

一开始是考虑用notepadd++来实现它，但对bash/python的其他建议持开放态度。。。等等

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EDIT1-解决方案

$ cat testw
SentMessage
DeliverySucceeded
DeliveryFailed
DeliveryTimedOut
NotAttemptedCreditLimitReached
NotAttemptedChargingFailure
SubscriptionFailed
SentReportSMDeliveryStatus
FailedToSendReportSMDeliveryStatus
ReportSMSucceeded
ReportSMFailed
$ sed -i 's/[A-Z]/\L&/' testw
$ cat testw
sentMessage
deliverySucceeded
deliveryFailed
deliveryTimedOut
notAttemptedCreditLimitReached
notAttemptedChargingFailure
subscriptionFailed
sentReportSMDeliveryStatus
failedToSendReportSMDeliveryStatus
reportSMSucceeded
reportSMFailed

Answer 1

如果您有gnu sed，则使用：

sed -i 's/[A-Z]/\L&/' file

• [A-Z]将匹配第一个大写字母
• &是模式匹配字符串的反向引用（在本例中是单个大写字母）
• \L将返回的引用转换为小写